x86/Voyager: remove ISA quirk

Voyager has this ISA quirk (because Voyager has no ISA support):

 config ISA
 	bool "ISA support"
	depends on !X86_VOYAGER

There's a ton of x86 hardware that does not support ISA, and because
most ISA drivers cannot auto-detect in a safe way, the convention in
the kernel has always been to not enable ISA drivers if they are not
needed.

Voyager users can do likewise - no need for a Kconfig quirk.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -1819,7 +1819,6 @@ if X86_32
 
 config ISA
 	bool "ISA support"
-	depends on !X86_VOYAGER
 	help
 	  Find out whether you have ISA slots on your motherboard.  ISA is the
 	  name of a bus system, i.e. the way the CPU talks to the other stuff