rtlwifi: rtl8192cu: Fix W=1 build warning
rtlwifi: rtl8192cu: Fix W=1 build warning

When this driver is built with "make W=1", the following warning is output:

drivers/net/wireless/rtlwifi/rtl8192cu/sw.c:56:6: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Larry Finger <ed0f1d78b8c21b2970494a178da4bdfa8beba2a7@lwfinger.net>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas