omap-common/omap4: relocate early UART clock setup

Moves the early UART clock setup setup_clocks_for_console() from
preloader_console_init() to s_init() of OMAP4.

This is done to prepare for OMAP3 integration.

This patch was posted seperatly to the mailinglist but I decidet - since it is
a prereqesit for this patch to add it. Former port to ML:
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/104395

Signed-off-by: Simon Schwarz <simonschwarzcor@gmail.com>
Signed-off-by: Tom Rini <trini@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

arch/arm/cpu/armv7/omap-common/spl.c

@@ -249,6 +249,7 @@ void board_init_r(gd_t *id, ulong dummy)
 	}
 }
 
+/* This requires UART clocks to be enabled */
 void preloader_console_init(void)
 {
 	const char *u_boot_rev = U_BOOT_VERSION;
@@ -259,7 +260,6 @@ void preloader_console_init(void)
 	gd->flags |= GD_FLG_RELOC;
 	gd->baudrate = CONFIG_BAUDRATE;
 
-	setup_clocks_for_console();
 	serial_init();		/* serial communications setup */
 
 	/* Avoid a second "U-Boot" coming from this string */

arch/arm/cpu/armv7/omap4/board.c

@@ -257,6 +257,7 @@ void s_init(void)
 	watchdog_init();
 	set_mux_conf_regs();
 #ifdef CONFIG_SPL_BUILD
+	setup_clocks_for_console();
 	preloader_console_init();
 	do_io_settings();
 #endif