ARM: OMAP: remove the sti console workaround

The sti console workaround uses the OMAP custom tags.
Those tags are not used in upstream kernel and therefore the workaround
never fires on upstream kernels.
Remove the sti console workaround tags part.
This leaves the workaround functional part intact so can be reused if
needed.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/pm24xx.c

@@ -352,16 +352,6 @@ int __init omap2_pm_init(void)
 
 	prcm_setup_regs();
 
-	/* Hack to prevent MPU retention when STI console is enabled. */
-	{
-		const struct omap_sti_console_config *sti;
-
-		sti = omap_get_config(OMAP_TAG_STI_CONSOLE,
-				      struct omap_sti_console_config);
-		if (sti != NULL && sti->enable)
-			sti_console_enabled = 1;
-	}
-
 	/*
 	 * We copy the assembler sleep/wakeup routines to SRAM.
 	 * These routines need to be in SRAM as that's the only