[MIPS] Make I8259A_IRQ_BASE customizable

Move I8259A_IRQ_BASE from asm/i8259.h to asm/mach-generic/irq.h and
make it really customizable.  And remove I8259_IRQ_BASE declared on
some platforms.  Currently only NEC_CMBVR4133 is using custom
I8259A_IRQ_BASE value.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/vr41xx/cmbvr4133.h b/include/asm-mips/vr41xx/cmbvr4133.h
index 9490ade..4230003 100644
--- a/include/asm-mips/vr41xx/cmbvr4133.h
+++ b/include/asm-mips/vr41xx/cmbvr4133.h
@@ -35,8 +35,8 @@
 #define CMBVR41XX_INTD_IRQ		GIU_IRQ(CMBVR41XX_INTD_PIN)
 #define CMBVR41XX_INTE_IRQ		GIU_IRQ(CMBVR41XX_INTE_PIN)
 
-#define I8259_IRQ_BASE			72
-#define I8259_IRQ(x)			(I8259_IRQ_BASE + (x))
+#define I8259A_IRQ_BASE			72
+#define I8259_IRQ(x)			(I8259A_IRQ_BASE + (x))
 #define TIMER_IRQ			I8259_IRQ(0)
 #define KEYBOARD_IRQ			I8259_IRQ(1)
 #define I8259_SLAVE_IRQ			I8259_IRQ(2)
@@ -52,6 +52,5 @@
 #define AUX_IRQ				I8259_IRQ(12)
 #define IDE_PRIMARY_IRQ			I8259_IRQ(14)
 #define IDE_SECONDARY_IRQ		I8259_IRQ(15)
-#define I8259_IRQ_LAST			IDE_SECONDARY_IRQ
 
 #endif /* __NEC_CMBVR4133_H */