[MIPS] Use mksh for /system/bin/sh

Signed-off-by: Chris Dearman <chris@mips.com>

Change-Id: I01a6c1e2ac9de5b6d86c2aace041a0f7400f6b5e
diff --git a/target/board/generic_mips/BoardConfig.mk b/target/board/generic_mips/BoardConfig.mk
index 8c2371f..c3881b4 100644
--- a/target/board/generic_mips/BoardConfig.mk
+++ b/target/board/generic_mips/BoardConfig.mk
@@ -34,9 +34,6 @@
 # no hardware camera
 USE_CAMERA_STUB := true
 
-# Set /system/bin/sh to ash, not mksh, to make sure we can switch back.
-TARGET_SHELL := ash
-
 # Enable dex-preoptimization to speed up the first boot sequence
 # of an SDK AVD. Note that this operation only works on Linux for now
 ifeq ($(HOST_OS),linux)