arm: Inline asm sometimes ignores 'register' declarations

This fix was derived from discusson on
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86673 and has come up
recently because we are compiling the v4.4.100 kernel with a newer
toolchain.

Change-Id: Ib9e6923b9900a8b7a825e0d7b0fb5b11a73b83f4
1 file changed