ARM: OMAP2+: PRM: provide generic API for system reset

This patch combines the various prm_warm_reset calls under a common
API prm_reset_system, and adds the SoC specific implementation under
prm_ll_data.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/prm33xx.c

@@ -341,7 +341,7 @@ static int am33xx_check_vcvp(void)
  *
  * Immediately reboots the device through warm reset.
  */
-void am33xx_prm_global_warm_sw_reset(void)
+static void am33xx_prm_global_warm_sw_reset(void)
 {
 	am33xx_prm_rmw_reg_bits(AM33XX_RST_GLOBAL_WARM_SW_MASK,
 				AM33XX_RST_GLOBAL_WARM_SW_MASK,
@@ -375,6 +375,7 @@ static struct prm_ll_data am33xx_prm_ll_data = {
 	.assert_hardreset		= am33xx_prm_assert_hardreset,
 	.deassert_hardreset		= am33xx_prm_deassert_hardreset,
 	.is_hardreset_asserted		= am33xx_prm_is_hardreset_asserted,
+	.reset_system			= am33xx_prm_global_warm_sw_reset,
 };
 
 int __init am33xx_prm_init(void)