staging: rtl8188eu: using unique names is good

fixes:

drivers/staging/built-in.o:(.opd+0xaab8): multiple definition of `rtl88e_phy_rf_config'
drivers/net/built-in.o:(.opd+0x78840): first defined here
drivers/staging/built-in.o:(.opd+0xa9f8): multiple definition of `rtl88e_download_fw'
drivers/net/built-in.o:(.opd+0x781b0): first defined here
drivers/staging/built-in.o: In function `.rtl88e_phy_rf_config':
(.text+0xe0a00): multiple definition of `.rtl88e_phy_rf_config'
drivers/net/built-in.o:(.text+0xe85a48): first defined here
drivers/staging/built-in.o: In function `.rtl88e_download_fw':
(.text+0xdf28c): multiple definition of `.rtl88e_download_fw'
drivers/net/built-in.o:(.text+0xe6f330): first defined here
drivers/staging/built-in.o: In function `.rtl88e_phy_mac_config':
(.text+0xdf984): multiple definition of `.rtl88e_phy_mac_config'
drivers/net/built-in.o:(.text+0xe84a8c): first defined here
drivers/staging/built-in.o: In function `.rtl88e_phy_bb_config':
(.text+0xdfa2c): multiple definition of `.rtl88e_phy_bb_config'
drivers/net/built-in.o:(.text+0xe84d14): first defined here
drivers/staging/built-in.o:(.opd+0xaa58): multiple definition of `rtl88e_phy_bb_config'
drivers/net/built-in.o:(.opd+0x78828): first defined here
drivers/staging/built-in.o:(.opd+0xaa28): multiple definition of `rtl88e_phy_mac_config'

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>