monarudo: audio: shamelessly kanged from m7

Change-Id: Ibcaf8d8f8d684bbe0d30cc5fff109e4bf7afff08
audio: force 24-bit for monarudo as well

Change-Id: I68b1aca7ced339939e3aa592b2c10664be5973b3
monarudo: don't map KEY_POWER in keypad, use PM8XX_PWRKEY

Change-Id: I707f186b3c83c247c122f0da2af5c64877fa61b5