rtl8187: Remove primitive write delays

Each of the primary write routines, rtl8187_write_phy(),
rtl8225_write_bitbang(), and rtl8225_write_8051() all conclude with an
msleep() command. Testing shows that these are not needed.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Tested-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>