KabyLakeSiliconPkg: Bitmask comparison logic bug

(Cpptv & B_PCH_SPI_SFDPX_VSCCX_CPPTV) can only evaluate to
two possible values, 0x0 or B_PCH_SPI_SFDPX_VSCCX_CPPTV
(aka BIT31). The current comparison to 0x1 will always fail.

Fixed the if statement to compare to B_PCH_SPI_SFDPX_VSCCX_CPPTV.

Signed-off-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Sai Chaganty <rangasai.v.chaganty@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Sai Chaganty <rangasai.v.chaganty@intel.com>