staging: rtl8723bs: Rename 'Hal8723BPhyCfg.h' using snake case.

Camel-case is discouraged in the linux kernel coding style.  Rename
this header file using snake case instead.
Signed-off-by: Quytelda Kahja <quytelda@tamalin.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8723bs/include/rtl8723b_hal.h

@@ -18,7 +18,7 @@
 #include "rtw_mp.h"
 #include "hal_pwr_seq.h"
 #include "hal_phy_reg_8723b.h"
-#include "Hal8723BPhyCfg.h"
+#include "hal_phy_cfg.h"
 
 /*  */
 /* 		RTL8723B From file */