rtl8187: fix tx power reading
rtl8187: fix tx power reading

CCK and OFDM power levels are stored in adjacent bytes, not nibbles.

Signed-off-by: Michael Wu <4c4e8e3a94fcb6eb178c6f7ea74acad94e89ca6b@sourmilk.net>
Signed-off-by: Andrea Merello <e1bf08635b77f847ba4f2b4d67dabf02abbb661b@tiscali.it>
Signed-off-by: John W. Linville <2a53bac7a5d324865ef46ec4c38b2c0fba1456b4@tuxdriver.com>

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