sparc32: Do not select GENERIC_ISA_DMA

sparc32 do not support generic isa dma, so do not select the symbol.

This fixes the following warnings:
dma.c:70:5: error: no previous prototype for 'request_dma' [-Werror=missing-prototypes]
dma.c:88:6: error: no previous prototype for 'free_dma' [-Werror=missing-prototypes]

Signed-off-by: Sam Ravnborg <[email protected]>
Fixes: 0fcb708 ("Makefile.extrawarn: turn on missing-prototypes globally")
Acked-by: Randy Dunlap <[email protected]>
Tested-by: Randy Dunlap <[email protected]> # build-tested
Cc: Andreas Larsson <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Randy Dunlap <[email protected]>
Cc: Maciej W. Rozycki <[email protected]>
Reviewed-by: Andreas Larsson <[email protected]>
Signed-off-by: Andreas Larsson <[email protected]>
Link: https://lore.kernel.org/r/20240224-sam-fix-sparc32-all-builds-v2-5-1f186603c5c4@ravnborg.org

Author: sravnborg

arch/sparc/Kconfig

@@ -138,10 +138,6 @@ config HIGHMEM
 	default y if SPARC32
 	select KMAP_LOCAL
 
-config GENERIC_ISA_DMA
-	bool
-	default y if SPARC32
-
 config PGTABLE_LEVELS
 	default 4 if 64BIT
 	default 3