Update commit IDs and README.md.

Signed-off-by: yang.wang <yang.wang@deepcomputing.io>

.gitmodules

@@ -9,12 +9,12 @@
 [submodule "linux"]
 	path = linux
 	url = https://github.com/DC-DeepComputing/fml13v01-linux.git
-	branch = JH7110_VisionFive2_6.6.y_devel
+	branch = fm7110-6.6
 [submodule "opensbi"]
 	path = opensbi
 	url = https://github.com/DC-DeepComputing/fml13v01-opensbi.git
 	branch = fm7110-6.6
 [submodule "soft_3rdpart"]
 	path = soft_3rdpart
-	url = https://github.com/DC-DeepComputing/fml13v01-soft_3rdpart.git
-	branch = fm7110-6.6
+	url = https://github.com/starfive-tech/soft_3rdpart.git
+	branch = JH7110_VisionFive2_devel

README.md

@@ -36,7 +36,11 @@ This will take some time and require around 12GB of disk space. Some modules may
 
 For developer, need to switch the 5 submodules `buildroot`, `u-boot`, `linux`, `opensbi`, `soft_3rdpart` to correct branch manually, or refer to `.gitmodule`
 
-	$ git submodule foreach --recursive "git checkout origin/fm7110-6.6 -B fm7110-6.6"
+	$ cd buildroot && git checkout -B fm7110-6.6 origin/fm7110-6.6 && cd ..
+	$ cd u-boot && git checkout -B fm7110-6.6 origin/fm7110-6.6 && cd ..
+	$ cd linux && git checkout -B fm7110-6.6 origin/fm7110-6.6 && cd ..
+	$ cd opensbi && git checkout -B fm7110-6.6 origin/fm7110-6.6 && cd ..
+	$ cd soft_3rdpart && git checkout -B fm7110-6.6 JH7110_VF2_6.6_v5.12.0 && cd ..
 
 ## Quick Build Instructions