try bkn partition details change for 4mb module

platforms/BK7231N/pre_build.sh

@@ -1,41 +1,12 @@
-# This script will be called just before starting build process for BK7231N
-# It allows you to make changes to the SDK, for example..
-# For example, you can use changed files in the SDK for the automated build during the checks for a PR without changing the SDK itself:
-# So if your PR requires a changed define in SDK, you can do this here
-
-#
-#
-# As an example you will find a script below which will copy all content of the "override"
-# directory to the corresponding location in the SDK
-#
-#DIRNAME=$(dirname $0);
-#echo "PREBUILD script! Executed from $DIRNAME!"
-# allow whitspace in file or path, so take only newline as seperator
-#OFS=$IFS
-#IFS='
-#'
-#for X in $(find platforms/BK7231N/override/ -type f);do
-#	# script is executed from main app directory, so take found file and path as source
-#	S=${X};
-#	# destination is path stripped from path to override
-#	# so inside "override" we have the full path to the file
-#	# starting with "sdk/OpenBK7231N/..."
-#	D=${X#platforms/BK7231N/override/};
-#	# if file is present, we replace it, otherwise file is added ...
-#	[ -e $D ] && echo "PREBUILD: replacing file\n\t$D\n\twith file\n\t$S" || echo "PREBUILD: adding file\n\t$S\n\tas\n\t$D"
-#	cp $S $D;
-#done
-## restore IFS to whatever it was before ...
-#IFS=$OFS
-
-# you can also use all other commands to change files, like
-# sed -i "s/#define FOO bar/#define FOO baz/" sdk/OpenBK7231N/platforms/bk7231n/bk7231n_os/beken378/file_to_change.c
-# or, let's assume you made a local change to your SDK
-# and make a diff from that change (inside sdk/OpenBK7231N/)
-# git diff > ../../platforms/BK7231N/my_change.diff
-# ( or make the diff and copy this file to platforms/BK7231N)
-#
-# and then in pre_build.sh you apply this patch with:
-#
-# patch -p 1 -d sdk/OpenBK7231N < platforms/BK7231N/my_change.diff
-
+DIRNAME=$(dirname $0);
+echo "PREBUILD script! Executed from $DIRNAME!"
+OFS=$IFS
+IFS='
+'
+for X in $(find platforms/BK7231N/override/ -type f);do
+S=${X};
+D=${X#platforms/BK7231N/override/};
+[ -e $D ] && echo "PREBUILD: replacing file\n\t$D\n\twith file\n\t$S" || echo "PREBUILD: adding file\n\t$S\n\tas\n\t$D"
+cp $S $D;
+done
+IFS=$OFS