ARM: entry: data abort: avoid using r2 in abort helpers

This allows us to pass the pt_regs pointer in to these functions
ready for tail-calling the abort handler.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mm/abort-ev5t.S

@@ -25,7 +25,7 @@ ENTRY(v5t_early_abort)
 	do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
 	ldreq	r3, [r4]			@ read aborted ARM instruction
 	bic	r1, r1, #1 << 11		@ clear bits 11 of FSR
-	do_ldrd_abort tmp=r2, insn=r3
+	do_ldrd_abort tmp=ip, insn=r3
 	tst	r3, #1 << 20			@ check write
 	orreq	r1, r1, #1 << 11
 	mov	pc, lr