TI: Drop 'CONFIG_OMAP'

In the two cases in the code where we use CONFIG_OMAP as a useful test
currently we can make use of CONFIG_ARCH_OMAP2PLUS instead.  With that
changed we can drop all defines of CONFIG_OMAP.  While in here,
CONFIG_OMAP3430 is only defined and then never used, so drop.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index ca55df7..0eb7c02 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -175,21 +175,17 @@
 		;
 
 	serial_out(CONFIG_SYS_NS16550_IER, &com_port->ier);
-#if defined(CONFIG_OMAP) || defined(CONFIG_AM33XX) || \
-			defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
+#if defined(CONFIG_ARCH_OMAP2PLUS)
 	serial_out(0x7, &com_port->mdr1);	/* mode select reset TL16C750*/
 #endif
 	serial_out(UART_MCRVAL, &com_port->mcr);
 	serial_out(ns16550_getfcr(com_port), &com_port->fcr);
 	if (baud_divisor != -1)
 		NS16550_setbrg(com_port, baud_divisor);
-#if defined(CONFIG_OMAP) || \
-	defined(CONFIG_AM33XX) || defined(CONFIG_SOC_DA8XX) || \
-	defined(CONFIG_TI81XX) || defined(CONFIG_AM43XX)
-
+#if defined(CONFIG_ARCH_OMAP2PLUS) || defined(CONFIG_SOC_DA8XX)
 	/* /16 is proper to hit 115200 with 48MHz */
 	serial_out(0, &com_port->mdr1);
-#endif /* CONFIG_OMAP */
+#endif
 #if defined(CONFIG_SOC_KEYSTONE)
 	serial_out(UART_REG_VAL_PWREMU_MGMT_UART_ENABLE, &com_port->regC);
 #endif