soc/intel/apollolake: fix space indention in pm.h

More spaces missed in review.

Change-Id: I842da05ca6ad4f2c13d2d42433e41da57ccf7f96
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15500
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins)
1 file changed