Revert "BaseTools: fix FCE build when edksetup not executed"

This reverts commit d031fc07eb.
There are the concerns on code design and code quality, and
request to rewrite FCE, BfmLib and FMMT for the review.

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Feng Bob C <bob.c.feng@intel.com>
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Feng Bob C <bob.c.feng@intel.com>

BaseTools/Source/C/FCE/GNUmakefile

@@ -42,7 +42,7 @@ endif
 export ARCH
 export HOST_ARCH=$(ARCH)
 
-MAKEROOT ?= ..
+MAKEROOT ?= $(EDK_TOOLS_PATH)/Source/C
 
 APPNAME = FCE