staging: rtl8723bs: place constant on the right side of the test

fix following post-hook checkpatch issue:

WARNING: Comparisons should place the constant on the right side of the test
85: FILE: drivers/staging/rtl8723bs/hal/sdio_halinit.c:676:
+	if (_FAIL == ret)

Suggested-by: Joe Perches <joe@perches.com>
Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/8a6967abaef8b2edad6dc829dd232a7f048899d2.1617640221.git.fabioaiuto83@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>