Do full BREGS backup/restore for pmm, pnp, and irqentry_extrastack

Although these entry points only require backup and restore of the
registers that the C code clobbers, there is no harm in backing up
some additional registers.  This allows the BREGS macros to be used
which makes the code a little more readable.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
1 file changed