ARM: Various: Future-proof serial platdata

A few boards still use ns16550_platdata structures, but assume the structure
is going to be in a specific order. By explicitly naming each entry,
this should also help 'future-proof' in the event the structure changes.

Tested on the Logic PD Torpedo + Wireless.

I only changed a handful of devices that used the same syntax as the Logic
board.  Appologies if I missed one or stepped on toes.  Thanks to Derald Woods
and Alexander Graf.

Signed-off-by: Adam Ford <aford173@gmail.com>

V6: Add fix to arch/arm/cpu/armv7/am33xx/board.c

V5: Add fix to arch/arm/cpu/arm926ejs/lpc32xx/devices.c

V4: Fix subject heading

V3: Remove  reg_offset out in all the structs. It was reverted out, and and if
it did exist, it would get initialized to 0 by default.

V2: I hastily copy-pasted the boards without looking at the UART number.
This addresses 3 boards that use UART3 and not UART1.
Reviewed-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/board/ti/beagle/beagle.c b/board/ti/beagle/beagle.c
index ff317ef..0ed4f52 100644
--- a/board/ti/beagle/beagle.c
+++ b/board/ti/beagle/beagle.c
@@ -73,9 +73,9 @@
 } expansion_config;
 
 static const struct ns16550_platdata beagle_serial = {
-	OMAP34XX_UART3,
-	2,
-	V_NS16550_CLK
+	.base = OMAP34XX_UART3,
+	.reg_shift = 2,
+	.clock = V_NS16550_CLK
 };
 
 U_BOOT_DEVICE(beagle_uart) = {