drivers/bus: arm-cci: fix combined ARMv6+v7 build

When we build a kernel with support for both ARMv6 and ARMv7,
gas is trying to be helpful by pointing out that the arm-cci
driver would not work on ARMv6:

/tmp/ccu1LDeU.s: Assembler messages:
/tmp/ccu1LDeU.s:450: Error: selected processor does not support ARM mode `wfi '
/tmp/ccu1LDeU.s:451: Error: selected processor does not support ARM mode `wfe '
make[4]: *** [drivers/bus/arm-cci.o] Error 1

We know that the driver will only be used on ARMv7, hence we
can annotate the inline assembly listing to allow those instructions.

Signed-off-by: Arnd Bergmann <[e-mail]>
Acked-by: Nicolas Pitre <[e-mail]>
Cc: Dave Martin <[e-mail]>

drivers/bus/arm-cci.c

···
 asmlinkage void __naked cci_enable_port_for_self(void)
 {
 	asm volatile ("\n"
-
+"	.arch armv7-a\n"
 "	mrc	p15, 0, r0, c0, c0, 5	@ get MPIDR value \n"
 "	and	r0, r0, #"__stringify(MPIDR_HWID_BITMASK)" \n"
 "	adr	r1, 5f \n"