ARM: ep93xx: ts72xx: cosmetic: Add some description to ts72xx code

This patch extends readability of ts72xx.c code.
Signed-off-by: NLukasz Majewski <lukma@denx.de>
Acked-by: NH Hartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: NAlexander Sverdlin <alexander.sverdlin@gmail.com>

arch/arm/mach-ep93xx/ts72xx.c

@@ -31,6 +31,9 @@
 #include "soc.h"
 #include "ts72xx.h"
 
+/*************************************************************************
+ * IO map
+ *************************************************************************/
 static struct map_desc ts72xx_io_desc[] __initdata = {
 	{
 		.virtual	= (unsigned long)TS72XX_MODEL_VIRT_BASE,
@@ -201,10 +204,16 @@ static struct platform_device ts72xx_wdt_device = {
 	.num_resources	= ARRAY_SIZE(ts72xx_wdt_resources),
 };
 
+/*************************************************************************
+ * ETH
+ *************************************************************************/
 static struct ep93xx_eth_data __initdata ts72xx_eth_data = {
 	.phy_id		= 1,
 };
 
+/*************************************************************************
+ * TS72XX support code
+ *************************************************************************/
 #if IS_ENABLED(CONFIG_FPGA_MGR_TS73XX)
 
 /* Relative to EP93XX_CS1_PHYS_BASE */