MIPS: ralink: add support for MT7620n

This is the small version of MT7620a.

Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/8030/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-ralink/mt7620.h

@@ -25,11 +25,8 @@
 #define SYSC_REG_CPLL_CONFIG0		0x54
 #define SYSC_REG_CPLL_CONFIG1		0x58
 
-#define MT7620N_CHIP_NAME0		0x33365452
-#define MT7620N_CHIP_NAME1		0x20203235
-
-#define MT7620A_CHIP_NAME0		0x3637544d
-#define MT7620A_CHIP_NAME1		0x20203032
+#define MT7620_CHIP_NAME0		0x3637544d
+#define MT7620_CHIP_NAME1		0x20203032
 
 #define SYSCFG0_XTAL_FREQ_SEL		BIT(6)