omap1: Add initcall checks for omap1 and booted board

Otherwise multi-omap1 configurations will fail.

Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap1/lcd_dma.c b/arch/arm/mach-omap1/lcd_dma.c
index 3be11af..c9088d8 100644
--- a/arch/arm/mach-omap1/lcd_dma.c
+++ b/arch/arm/mach-omap1/lcd_dma.c
@@ -424,6 +424,9 @@
 {
 	int r;
 
+	if (!cpu_class_is_omap1())
+		return -ENODEV;
+
 	if (cpu_is_omap16xx()) {
 		u16 w;