{soc,sb}/amd: Remove unused SOUTHBRIDGE_AMD_*_SKIP_ISA_DMA_INIT

Change-Id: Ic9bca9a56663926a153b93c298f69ba7d26f6e5e
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29620
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
diff --git a/src/soc/amd/stoneyridge/Kconfig b/src/soc/amd/stoneyridge/Kconfig
index 4411984..6255cfc 100644
--- a/src/soc/amd/stoneyridge/Kconfig
+++ b/src/soc/amd/stoneyridge/Kconfig
@@ -147,10 +147,6 @@
 	hex
 	default 0xc0000
 
-config SOUTHBRIDGE_AMD_STONEYRIDGE_SKIP_ISA_DMA_INIT
-	bool
-	default n
-
 config EHCI_BAR
 	hex
 	default 0xfef00000
diff --git a/src/southbridge/amd/agesa/hudson/Kconfig b/src/southbridge/amd/agesa/hudson/Kconfig
index 4f769fb..65831b0 100644
--- a/src/southbridge/amd/agesa/hudson/Kconfig
+++ b/src/southbridge/amd/agesa/hudson/Kconfig
@@ -35,10 +35,6 @@
 	string
 	default "southbridge/amd/agesa/hudson/bootblock.c"
 
-config SOUTHBRIDGE_AMD_HUDSON_SKIP_ISA_DMA_INIT
-	bool
-	default n
-
 config EHCI_BAR
 	hex
 	default 0xfef00000
diff --git a/src/southbridge/amd/pi/hudson/Kconfig b/src/southbridge/amd/pi/hudson/Kconfig
index 9d803be..a30dacd 100644
--- a/src/southbridge/amd/pi/hudson/Kconfig
+++ b/src/southbridge/amd/pi/hudson/Kconfig
@@ -38,10 +38,6 @@
 	string
 	default "southbridge/amd/pi/hudson/bootblock.c"
 
-config SOUTHBRIDGE_AMD_HUDSON_SKIP_ISA_DMA_INIT
-	bool
-	default n
-
 config EHCI_BAR
 	hex
 	default 0xfef00000
diff --git a/src/southbridge/amd/sb800/Kconfig b/src/southbridge/amd/sb800/Kconfig
index d66469a..245a9f2 100644
--- a/src/southbridge/amd/sb800/Kconfig
+++ b/src/southbridge/amd/sb800/Kconfig
@@ -24,10 +24,6 @@
 	string
 	default "southbridge/amd/sb800/bootblock.c"
 
-config SOUTHBRIDGE_AMD_SB800_SKIP_ISA_DMA_INIT
-	bool
-	default n
-
 config EHCI_BAR
 	hex
 	default 0xfef00000