x86/generic: enable pata_atiixp driver

This enables booting from devices that use an ATI PATA controller for
the boot device, such as the embedded CF cards in Fujitsu-Siemens Futro
thin-clients.

Signed-off-by: Felix Kaechele <heffer@fedoraproject.org>

Backport of r47304

git-svn-id: svn://svn.openwrt.org/openwrt/branches/chaos_calmer@48861 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/x86/generic/config-default

@@ -153,6 +153,7 @@ CONFIG_NLS=y
 CONFIG_NO_HZ=y
 # CONFIG_PANASONIC_LAPTOP is not set
 CONFIG_PATA_AMD=y
+CONFIG_PATA_ATIIXP=y
 CONFIG_PATA_LEGACY=y
 CONFIG_PATA_MPIIX=y
 CONFIG_PATA_OLDPIIX=y