mmc: wmt-sdmmc: Simplify wmt_set_sd_power implementation
mmc: wmt-sdmmc: Simplify wmt_set_sd_power implementation

Simplify the code to set/clear BM_SD_OFF bit:

          | power_inverted: 0  | power_inverted: 1
-------------------------------------------------
enable: 0 | SET BM_SD_OFF      | CLEAR BM_SD_OFF
-------------------------------------------------
enable: 1 | CLEAR BM_SD_OFF    | SET BM_SD_OFF

Signed-off-by: Axel Lin <b6ffd6973e972cb999e8e535ab74da7fee0c035f@ingics.com>
Acked-by: Tony Prisk <ba324ca7b1c77fc20bb970d5aff6eea9377918a5@prisktech.co.nz>
Signed-off-by: Chris Ball <6ca7faee6ca9a094b1ee341f11b840a5608a8746@laptop.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs