MIPS: Alchemy: Stop IRQ name sharing

Eliminate the sharing of IRQ names among the differenct Alchemy
variants.  IRQ numbers need no longer be hidden behind a
CONFIG_SOC_AU1XXX symbol: step 1 in my quest to make the Alchemy
code less reliant on a hardcoded subtype.

This patch also renames the GPIO irq number constants. It's really
an interrupt line, NOT a GPIO number!

Code which relied on certain irq numbers to have the same name
across all supported cpu subtypes is changed to determine current
cpu subtype at runtime; in some places this isn't possible so
a "compat" symbol is used.

Run-tested on DB1200.

Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/alchemy/devboards/pb1550/platform.c b/arch/mips/alchemy/devboards/pb1550/platform.c
index aa5016c..b496fb6 100644
--- a/arch/mips/alchemy/devboards/pb1550/platform.c
+++ b/arch/mips/alchemy/devboards/pb1550/platform.c
@@ -40,8 +40,8 @@
 				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00040000 - 1,
 				    PCMCIA_IO_PSEUDO_PHYS,
 				    PCMCIA_IO_PSEUDO_PHYS   + 0x00001000 - 1,
-				    AU1500_GPIO_201_205,
-				    AU1000_GPIO_0,
+				    AU1550_GPIO201_205_INT,
+				    AU1550_GPIO0_INT,
 				    0,
 				    0,
 				    0);
@@ -52,8 +52,8 @@
 				    PCMCIA_MEM_PSEUDO_PHYS  + 0x00840000 - 1,
 				    PCMCIA_IO_PSEUDO_PHYS   + 0x00800000,
 				    PCMCIA_IO_PSEUDO_PHYS   + 0x00801000 - 1,
-				    AU1500_GPIO_201_205,
-				    AU1000_GPIO_1,
+				    AU1550_GPIO201_205_INT,
+				    AU1550_GPIO1_INT,
 				    0,
 				    0,
 				    1);