ARM: mvebu: drop unnecessary label

The label mvebu_boot_wa_start is not necessary and causes a build
issue when building with LLVM's integrated assembler:
    AS      arch/arm/mach-mvebu/pmsu_ll.o
  arch/arm/mach-mvebu/pmsu_ll.S:59:1: error: invalid symbol redefinition
  mvebu_boot_wa_start:
  ^

Drop the label.
Signed-off-by: Stefan Agner <stefan@agner.ch>
Acked-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

arch/arm/mach-mvebu/pmsu_ll.S

@@ -56,7 +56,6 @@ ENDPROC(armada_38x_cpu_resume)
 
 /* The following code will be executed from SRAM */
 ENTRY(mvebu_boot_wa_start)
-mvebu_boot_wa_start:
 ARM_BE8(setend	be)
 	adr	r0, 1f
 	ldr	r0, [r0]		@ load the address of the