arch/arm: add the cortex A17 variant supported by gcc 5.x

Add the Cortex A17 variant. This core is considered a replacement
of the Cortex A12 and is supported by gcc 5 / binutils 2.25+

Suggested-by: Ross Green <greenfross@netscape.net>
Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

arch/Config.in.arm

@@ -159,6 +159,14 @@ config BR2_cortex_a15
 	select BR2_ARM_CPU_HAS_THUMB2
 	select BR2_ARM_CPU_ARMV7A
 	select BR2_ARCH_HAS_MMU_OPTIONAL
+config BR2_cortex_a17
+	bool "cortex-A17"
+	select BR2_ARM_CPU_HAS_ARM
+	select BR2_ARM_CPU_HAS_NEON
+	select BR2_ARM_CPU_HAS_VFPV4
+	select BR2_ARM_CPU_HAS_THUMB2
+	select BR2_ARM_CPU_ARMV7A
+	select BR2_ARCH_HAS_MMU_OPTIONAL
 config BR2_cortex_m3
 	bool "cortex-M3"
 	select BR2_ARM_CPU_HAS_THUMB
@@ -442,6 +450,7 @@ config BR2_GCC_TARGET_CPU
 	default "cortex-a9"	if BR2_cortex_a9
 	default "cortex-a12"	if BR2_cortex_a12
 	default "cortex-a15"	if BR2_cortex_a15
+	default "cortex-a17"	if BR2_cortex_a17
 	default "cortex-m3"	if BR2_cortex_m3
 	default "fa526"		if BR2_fa526
 	default "marvell-pj4"	if BR2_pj4

package/binutils/Config.in.host

@@ -12,6 +12,8 @@ choice
 			   !BR2_powerpc64le && !BR2_nios2
 		# Unsupported for MIPS R6
 		depends on !BR2_mips_32r6 && !BR2_mips_64r6
+		# Unsupported ARM cores
+		depends on !BR2_cortex_a17
 		bool "binutils 2.23.2"
 
 	config BR2_BINUTILS_VERSION_2_24_X
@@ -19,6 +21,8 @@ choice
 		depends on !BR2_nios2 && !BR2_powerpc64le
 		# Unsupported for MIPS R6
 		depends on !BR2_mips_32r6 && !BR2_mips_64r6
+		# Unsupported ARM cores
+		depends on !BR2_cortex_a17
 		bool "binutils 2.24"
 
 	config BR2_BINUTILS_VERSION_2_25_X

package/gcc/Config.in.host

@@ -21,7 +21,8 @@ choice
 			&& !BR2_powerpc64le && !BR2_nios2
 		# Broken or unsupported ARM cores
 		depends on !BR2_cortex_a7 && !BR2_cortex_a12 && \
-			!BR2_cortex_a15 && !BR2_fa526 && !BR2_pj4
+			!BR2_cortex_a15 && !BR2_cortex_a17 && \
+			!BR2_fa526 && !BR2_pj4
 		# Broken or unsupported PPC cores
 		depends on !BR2_powerpc_e5500 && !BR2_powerpc_e6500 && \
 			!BR2_powerpc_power8
@@ -44,7 +45,7 @@ choice
 		depends on !BR2_microblaze && !BR2_aarch64 && !BR2_arc \
 			&& !BR2_powerpc64le && !BR2_nios2
 		# Broken or unsupported ARM cores
-		depends on !BR2_cortex_a12 && !BR2_pj4
+		depends on !BR2_cortex_a12 && !BR2_pj4 && !BR2_cortex_a17
 		# Broken or unsupported PPC cores
 		depends on !BR2_powerpc_e5500 && !BR2_powerpc_e6500 && \
 			!BR2_powerpc_power8
@@ -63,7 +64,7 @@ choice
 		depends on !BR2_microblaze && !BR2_arc \
 			&& !BR2_powerpc64le && !BR2_nios2
 		# Broken or unsupported ARM cores
-		depends on !BR2_cortex_a12
+		depends on !BR2_cortex_a12 && !BR2_cortex_a17
 		# Broken or unsupported PPC cores
 		depends on !BR2_powerpc_power8
 		# gcc-4.8.x + binutils-2.25 is broken for MIPS
@@ -86,6 +87,8 @@ choice
 		bool "gcc 4.9.x"
 		# Broken or unsupported architectures
 		depends on !BR2_arc
+		# Broken or unsupported ARM cores
+		depends on !BR2_cortex_a17
 		# Unsupported for MIPS R6
 		depends on !BR2_mips_32r6 && !BR2_mips_64r6
 		# PR60102 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102