Make some local functions static and fix coding style in these function
declarations when It is necessary

These are the local functions that were made static:
rtl8192_CalculateBitShift, rtl8192_phy_RFSerialRead,
rtl8192_phy_RFSerialWrite, rtl8192_InitBBRFRegDef,
rtl8192_BB_Config_ParaFile,rtl8192_SetTxPowerLevel,
rtl8192_phy_SetSwChnlCmdArray, rtl8192_phy_SwChnlStepByStep,
rtl8192_phy_FinishSwChnlNow

Fixed the following sparse warnings in r819xU_phy.c

drivers/staging/rtl8192u/r819xU_phy.c:47:5: warning: symbol 'rtl8192_CalculateBitShift' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:147:5: warning: symbol 'rtl8192_phy_RFSerialRead' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:232:6: warning: symbol 'rtl8192_phy_RFSerialWrite' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:574:6: warning: symbol 'rtl8192_InitBBRFRegDef' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:783:6: warning: symbol 'rtl8192_BB_Config_ParaFile' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:1073:6: warning: symbol 'rtl8192_SetTxPowerLevel' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:1242:4: warning: symbol 'rtl8192_phy_SetSwChnlCmdArray' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:1279:4: warning: symbol 'rtl8192_phy_SwChnlStepByStep' was not declared. Should it be static?
drivers/staging/rtl8192u/r819xU_phy.c:1436:6: warning: symbol 'rtl8192_phy_FinishSwChnlNow' was not declared. Should it be static?
Signed-off-by: Ana Rey <anarey@gmail.com>
Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>