soc/amd/stoneyridge: Improve code quality

Remove empty functions. In function pointer structure
"device_operations", replace the 0 equality by NULL equality.
Files: hda.c, sata.c and usb.c

Change-Id: I9f8dc7681ab2e651872e69a8b2e990e59ebe80c9
Signed-off-by: Richard Spiegel <richard.spiegel@amd.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/21522
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions