mach-u300: drop SEMI config option

When we have only dual-RAM configurations, the SEMI (shared
memory interface) must always be enabled.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/arch/arm/mach-u300/core.c b/arch/arm/mach-u300/core.c
index 399c89f..8b78af9 100644
--- a/arch/arm/mach-u300/core.c
+++ b/arch/arm/mach-u300/core.c
@@ -1837,17 +1837,10 @@
 	/* Register subdevices on the SPI bus */
 	u300_spi_register_board_devices();
 
-#ifndef CONFIG_MACH_U300_SEMI_IS_SHARED
-	/*
-	 * Enable SEMI self refresh. Self-refresh of the SDRAM is entered when
-	 * both subsystems are requesting this mode.
-	 * If we not share the Acc SDRAM, this is never the case. Therefore
-	 * enable it here from the App side.
-	 */
+	/* Enable SEMI self refresh */
 	val = readw(U300_SYSCON_VBASE + U300_SYSCON_SMCR) |
 		U300_SYSCON_SMCR_SEMI_SREFREQ_ENABLE;
 	writew(val, U300_SYSCON_VBASE + U300_SYSCON_SMCR);
-#endif /* CONFIG_MACH_U300_SEMI_IS_SHARED */
 }
 
 static int core_module_init(void)