omap: mailbox: use correct config for omap1

CONFIG_OMAP_DSP is not in mainline, CONFIG_OMAP_MBOX_FWK is.

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
diff --git a/arch/arm/mach-omap1/devices.c b/arch/arm/mach-omap1/devices.c
index 462b59c..da796f2 100644
--- a/arch/arm/mach-omap1/devices.c
+++ b/arch/arm/mach-omap1/devices.c
@@ -63,7 +63,7 @@
 static inline void omap_init_rtc(void) {}
 #endif
 
-#if defined(CONFIG_OMAP_DSP) || defined(CONFIG_OMAP_DSP_MODULE)
+#if defined(CONFIG_OMAP_MBOX_FWK) || defined(CONFIG_OMAP_MBOX_FWK_MODULE)
 
 #if defined(CONFIG_ARCH_OMAP15XX)
 #  define OMAP1_MBOX_SIZE	0x23