package/gdb: switch to gdb 10.x as the default

When doing this, we can simplify the RISC-V related logic. Indeed, as
there was no support for RISC-V in gdb 9.x, which was the current
default, we had some trickery in the Config.in file to ensure gdb 10.x
was used by default on RISC-V. However now that 10.x is the default
for everybody, this trickery is no longer needed.

Also, we now needs to enable BR2_PACKAGE_GDB_TOPLEVEL when host-gdb is
not built, as the default target gdb version is 10.x, and threfore
requires BR2_PACKAGE_GDB_TOPLEVEL=y.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/gdb/Config.in.host

@@ -61,7 +61,7 @@ config BR2_PACKAGE_HOST_GDB_SIM
 
 choice
 	prompt "GDB debugger Version"
-	default BR2_GDB_VERSION_9_2
+	default BR2_GDB_VERSION_10
 	depends on !BR2_arc
 	depends on !BR2_csky
 	help
@@ -93,8 +93,8 @@ config BR2_GDB_VERSION
 	default "arc-2020.09-release-gdb" if BR2_arc
 	default "4ecb98fbc2f94dbe01b69384afbc515107de73df" if BR2_csky
 	default "8.3.1"    if BR2_GDB_VERSION_8_3
-	default "9.2"      if BR2_GDB_VERSION_9_2 || (!BR2_PACKAGE_HOST_GDB && !BR2_riscv)
-	default "10.2"	   if BR2_GDB_VERSION_10 || (!BR2_PACKAGE_HOST_GDB && BR2_riscv)
+	default "9.2"      if BR2_GDB_VERSION_9_2
+	default "10.2"	   if BR2_GDB_VERSION_10 || !BR2_PACKAGE_HOST_GDB
 	default "11.1"     if BR2_GDB_VERSION_11
 	depends on BR2_PACKAGE_GDB || BR2_PACKAGE_HOST_GDB
 
@@ -105,5 +105,5 @@ config BR2_PACKAGE_GDB_TOPLEVEL
 	default y if BR2_arc
 	default y if BR2_GDB_VERSION_10
 	default y if BR2_GDB_VERSION_11
-	default y if !BR2_PACKAGE_HOST_GDB && BR2_riscv
+	default y if !BR2_PACKAGE_HOST_GDB
 	depends on BR2_PACKAGE_GDB || BR2_PACKAGE_HOST_GDB