omap: serial: Change device name: omap-hsuart -> omap_uart

The naming convention for omap_device is omap_XXX.

Rename the device and driver name in order to stick
to this naming convention.
Remove the hs prefix that is implicit for every OMAP uarts.
Signed-off-by: NBenoit Cousson <b-cousson@ti.com>
Acked-by: NGovindraj Raja <govindraj.raja@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/plat-omap/include/plat/omap-serial.h

@@ -22,7 +22,7 @@
 
 #include <plat/mux.h>
 
-#define DRIVER_NAME	"omap-hsuart"
+#define DRIVER_NAME	"omap_uart"
 
 /*
  * Use tty device name as ttyO, [O -> OMAP]