crypto: vmx - Fix aes_p8_xts_decrypt build failure

We use _GLOBAL so there is no need to do the manual alignment,
in fact it causes a build failure.

Reported-by: Stephen Rothwell <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/vmx/aesp8-ppc.pl

···
 .size	.${prefix}_xts_encrypt,.-.${prefix}_xts_encrypt
 
 .globl	.${prefix}_xts_decrypt
-.align	5
-.${prefix}_xts_decrypt:
 	mr		$inp,r3				# reassign
 	li		r3,-1
 	${UCMP}i	$len,16