ARM: AM43XX: PRM: use OMAP4 PRM driver

AM43xx will be re-using OMAP4 PRM driver, thus call its init function.
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/io.c

@@ -591,6 +591,7 @@ void __init am43xx_init_early(void)
 	omap_cm_base_init();
 	omap3xxx_check_revision();
 	am33xx_check_features();
+	omap44xx_prm_init();
 	am43xx_powerdomains_init();
 	am43xx_clockdomains_init();
 	am43xx_hwmod_init();