Staging: rtl8821ae: removed unused functions and variables

Clean up a bunch of build warnings by removing functions and variables that
aren't being used.

Cc: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/rtl8821ae/rtl8821ae/dm.c
Simple merge

diff --cc drivers/staging/rtl8821ae/rtl8821ae/fw.c
Simple merge

diff --cc drivers/staging/rtl8821ae/rtl8821ae/phy.c
Simple merge

diff --cc drivers/staging/rtl8821ae/rtl8821ae/trx.c
Simple merge