Blackfin: update defconfigs

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Yi Li <yi.li@analog.com>
Signed-off-by: Harald Krapfenbauer <Harald.Krapfenbauer@bluetechnix.at>
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/configs/PNAV-10_defconfig b/arch/blackfin/configs/PNAV-10_defconfig
index ff377fa..67d1276 100644
--- a/arch/blackfin/configs/PNAV-10_defconfig
+++ b/arch/blackfin/configs/PNAV-10_defconfig
@@ -63,6 +63,7 @@
 CONFIG_SLAB=y
 # CONFIG_SLUB is not set
 # CONFIG_SLOB is not set
+CONFIG_MMAP_ALLOW_UNINITIALIZED=y
 # CONFIG_PROFILING is not set
 # CONFIG_MARKERS is not set
 CONFIG_HAVE_OPROFILE=y
@@ -285,6 +286,7 @@
 # CONFIG_PHYS_ADDR_T_64BIT is not set
 CONFIG_ZONE_DMA_FLAG=1
 CONFIG_VIRT_TO_BUS=y
+CONFIG_NOMMU_INITIAL_TRIM_EXCESS=0
 CONFIG_BFIN_GPTIMERS=y
 # CONFIG_DMA_UNCACHED_4M is not set
 # CONFIG_DMA_UNCACHED_2M is not set