isa: Decouple X86_32 dependency from the ISA Kconfig option

The introduction of the ISA_BUS option blocks the compilation of ISA
drivers on non-x86 platforms. The ISA_BUS configuration option should
not be necessary if the X86_32 dependency can be decoupled from the ISA
configuration option. This patch both removes the ISA_BUS configuration
option entirely and removes the X86_32 dependency from the ISA
configuration option.

Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/include/linux/isa.h b/include/linux/isa.h
index 2a02862..b0270e3 100644
--- a/include/linux/isa.h
+++ b/include/linux/isa.h
@@ -22,7 +22,7 @@
 
 #define to_isa_driver(x) container_of((x), struct isa_driver, driver)
 
-#ifdef CONFIG_ISA_BUS
+#ifdef CONFIG_ISA
 int isa_register_driver(struct isa_driver *, unsigned int);
 void isa_unregister_driver(struct isa_driver *);
 #else