avr32: Remove DMATEST from defconfigs

In the defconfigs for ATNGW100 and ATSTK100[236] the DMA Test driver is
compiled as a module.  This means systems built with *_defconfig +
CONFIG_MODULES=n are unusable as the 3 dma test channels monopolise the
CPU.

I 'spose Haavard uses this module a lot but IMO it isn't really
something needed on all eval boards by default.
Signed-off-by: Ben Nizette <bn@niasdigital.com>
Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>

arch/avr32/configs/atngw100_defconfig

@@ -892,7 +892,7 @@ CONFIG_DMA_ENGINE=y
 # DMA Clients
 #
 # CONFIG_NET_DMA is not set
-CONFIG_DMATEST=m
+# CONFIG_DMATEST is not set
 # CONFIG_UIO is not set
 
 #

arch/avr32/configs/atstk1002_defconfig

@@ -964,7 +964,7 @@ CONFIG_DMA_ENGINE=y
 # DMA Clients
 #
 # CONFIG_NET_DMA is not set
-CONFIG_DMATEST=m
+# CONFIG_DMATEST is not set
 # CONFIG_UIO is not set
 
 #

arch/avr32/configs/atstk1003_defconfig

@@ -882,7 +882,7 @@ CONFIG_DMA_ENGINE=y
 # DMA Clients
 #
 # CONFIG_NET_DMA is not set
-CONFIG_DMATEST=m
+# CONFIG_DMATEST is not set
 # CONFIG_UIO is not set
 
 #

arch/avr32/configs/atstk1006_defconfig

@@ -1014,7 +1014,7 @@ CONFIG_DMA_ENGINE=y
 # DMA Clients
 #
 # CONFIG_NET_DMA is not set
-CONFIG_DMATEST=m
+# CONFIG_DMATEST is not set
 # CONFIG_UIO is not set
 # CONFIG_STAGING is not set
 CONFIG_STAGING_EXCLUDE_BUILD=y