Staging: Winbond: Fix assorted spacing issues.

Fix the phy_calibration.c file's spacing issues and convert the spaces
to tabs. This reduces the number of errors and warnings returned by
checkpatch.pl.
Signed-off-by: NAkshay Joshi <me@akshayjoshi.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>