Staging: rtl8723bs: hal: fix warning possible condition with no effect (if == else)

this patch fixes below coccicheck warning

./drivers/staging/rtl8723bs/hal/odm_DIG.c:499:1-3: WARNING: possible
condition with no effect (if == else)

Signed-off-by: Hariprasad Kelam <hariprasad.kelam@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>