mfd: twl6040: Update register bit definitions

Add define for: HSDRV, HFDAC, HFPGA and HFDRV enable bits

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
CC: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>