arm64: Remove unused cpu_name ascii in arch/arm64/mm/proc.S

This string has been moved to arch/arm64/kernel/cputable.c.
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/proc.S

@@ -95,10 +95,6 @@ ENTRY(cpu_do_switch_mm)
 	ret
 ENDPROC(cpu_do_switch_mm)
 
-cpu_name:
-	.ascii	"AArch64 Processor"
-	.align
-
 	.section ".text.init", #alloc, #execinstr
 
 /*