[ARM] 4993/1: <IMX UART>: Trivial: Remove unused defines

This patch removes the unused defines NR_PORTS and IMX_ISR_PASS_LIMIT in
the imx serial driver.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

drivers/serial/imx.c

@@ -166,10 +166,6 @@
 #define SERIAL_IMX_MAJOR	204
 #define MINOR_START		41
 
-#define NR_PORTS		2
-
-#define IMX_ISR_PASS_LIMIT	256
-
 /*
  * This is the size of our serial port register set.
  */