ARM: OMAP2+: Kconfig: convert SOC_OMAPTI81XX to SOC_TI81XX

No need to have an OMAP prefix on these SoCs that are in the family
but arent' really called OMAP.

Simple rename: CONFIG_SOC_OMAPTI81XX --> CONFIG_SOC_TI81XX

No functional change.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Acked-by: Vaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
index 7f47e3f..12949dd 100644
--- a/arch/arm/mach-omap2/irq.c
+++ b/arch/arm/mach-omap2/irq.c
@@ -230,7 +230,7 @@
 			goto out;
 
 		irqnr = readl_relaxed(base_addr + 0xd8);
-#ifdef CONFIG_SOC_OMAPTI81XX
+#ifdef CONFIG_SOC_TI81XX
 		if (irqnr)
 			goto out;
 		irqnr = readl_relaxed(base_addr + 0xf8);