Add ATMEL LCD driver

This patch adds support for the ATMEL LCDC driver which is used on some
AT91 and AVR platforms.

Is has been tested with the AT91CAP9ADK, AT91SAM9261EK, AT91SAM9263EK and
AT91SAM9RLEK boards. Adaptation for AVR32 should probably be easy.

Signed-off-by: Stelian Pop <stelian@popies.net>
Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/asm-arm/arch-at91sam9/clk.h b/include/asm-arm/arch-at91sam9/clk.h
index f67b435..1b502c8 100644
--- a/include/asm-arm/arch-at91sam9/clk.h
+++ b/include/asm-arm/arch-at91sam9/clk.h
@@ -36,4 +36,10 @@
 	return AT91_MASTER_CLOCK;
 }
 
+static inline unsigned long get_lcdc_clk_rate(unsigned int dev_id)
+{
+	return AT91_MASTER_CLOCK;
+}
+
+
 #endif /* __ASM_ARM_ARCH_CLK_H__ */