ARM: tegra21: hawkeye: set modem control signal to unused for wifi sku

ARM: tegra21: hawkeye: set modem control signal to unused for wifi sku

Hawkeye platform with WIFI SKU will not use the modem control signal
and so keeping these in low power mode.

Signals are:
	MODEM-DETECT  ---> PK4
	MODEM_AP_WAKE_MDM --->PK5
	MDM1_COLDBOOT --->PK6
	MDM1_PWR_ON --->PK7

	MDM1_MDM_RST ---->PL0
	MDM1_MDM_PWR_REPORT --->PL1

bug 200112282

Change-Id: I607f743a3f967d7247ca2c1860d208774545cb39
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
(cherry picked from commit 9cacae7b584bf84d967d1a5a2b3505e5e684ad18)
Reviewed-on: http://git-master/r/754983