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>

diff --cc arch/arm/mm/abort-ev5t.S
Simple merge

diff --cc arch/arm/mm/abort-ev5tj.S
Simple merge

diff --cc arch/arm/mm/abort-ev6.S
Simple merge

diff --cc arch/arm/mm/abort-ev7.S
Simple merge

diff --cc arch/arm/mm/abort-lv4t.S
Simple merge

diff --cc arch/arm/mm/proc-arm6_7.S
Simple merge