powerpc/configs: Remove old symbols from defconfigs

Update defconfigs to remove old symbols and comments referencing old
symbols.

Dropped:

* AVERAGE
* INET_LRO
* EXT3_DEFAULTS_TO_ORDERED
* EXT3_FS_XATTR
* I2O
* INFINIBAND_AMSO1100
* INFINIBAND_EHCA
* IP1000

Replaced:

* BLK_DEV_XIP -> BLK_DEV_RAM_DAX
* CLK_PPC_CORENET -> CLK_QORIQ
* EXT2_FS_XIP -> FS_DAX
* EXT3_FS* -> EXT4_FS*

Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/arch/powerpc/configs/ppc64_defconfig b/arch/powerpc/configs/ppc64_defconfig
index b041fb6..0a8d250 100644
--- a/arch/powerpc/configs/ppc64_defconfig
+++ b/arch/powerpc/configs/ppc64_defconfig
@@ -247,7 +247,6 @@
 CONFIG_INFINIBAND_USER_MAD=m
 CONFIG_INFINIBAND_USER_ACCESS=m
 CONFIG_INFINIBAND_MTHCA=m
-CONFIG_INFINIBAND_EHCA=m
 CONFIG_INFINIBAND_CXGB3=m
 CONFIG_INFINIBAND_CXGB4=m
 CONFIG_MLX4_INFINIBAND=m
@@ -262,14 +261,11 @@
 CONFIG_RTC_DRV_DS1307=y
 CONFIG_VIRTIO_PCI=m
 CONFIG_VIRTIO_BALLOON=m
+CONFIG_FS_DAX=y
 CONFIG_EXT2_FS=y
 CONFIG_EXT2_FS_XATTR=y
 CONFIG_EXT2_FS_POSIX_ACL=y
 CONFIG_EXT2_FS_SECURITY=y
-CONFIG_EXT2_FS_XIP=y
-CONFIG_EXT3_FS=y
-CONFIG_EXT3_FS_POSIX_ACL=y
-CONFIG_EXT3_FS_SECURITY=y
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y