powerpc/64: Allow CONFIG_RELOCATABLE if COMPILE_TEST

This was a hack we added to work around the allmodconfig build breaking, see
commit fb43e8477ed9 ("powerpc: Disable RELOCATABLE for COMPILE_TEST with
PPC64").

Since we merged the thin archives support in commit 43c9127d94d6 ("powerpc: Add
option to use thin archives") this hasn't been necessary, so remove it.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/Kconfig

@@ -540,7 +540,7 @@ config KEXEC_FILE
 
 config RELOCATABLE
 	bool "Build a relocatable kernel"
-	depends on (PPC64 && !COMPILE_TEST) || (FLATMEM && (44x || FSL_BOOKE))
+	depends on PPC64 || (FLATMEM && (44x || FSL_BOOKE))
 	select NONSTATIC_KERNEL
 	select MODULE_REL_CRCS if MODVERSIONS
 	help
@@ -574,7 +574,7 @@ config RELOCATABLE_TEST
 config CRASH_DUMP
 	bool "Build a kdump crash kernel"
 	depends on PPC64 || 6xx || FSL_BOOKE || (44x && !SMP)
-	select RELOCATABLE if (PPC64 && !COMPILE_TEST) || 44x || FSL_BOOKE
+	select RELOCATABLE if PPC64 || 44x || FSL_BOOKE
 	help
 	  Build a kernel suitable for use as a kdump capture kernel.
 	  The same kernel binary can be used as production kernel and dump