【OpenHarmony开源贡献者计划2022】update zh-cn/device-dev/porting/porting-stm32mp15xx-on-smallsystem.md.

修改md文档中关于BUILD.gn中的代码规范
Signed-off-by: N吴家栋 <jiadong.wu@unionman.com.cn>

zh-cn/device-dev/porting/porting-stm32mp15xx-on-smallsystem.md

@@ -195,74 +195,74 @@ vendor
     cmd = "if [ -f $product_path/hdf_config/BUILD.gn ]; then echo true; else echo false; fi"
     HAVE_PRODUCT_CONFIG =
         exec_script("//build/lite/run_shell_cmd.py", [ cmd ], "value")
-
+    
     group("liteos_a") {
-    deps = [
+      deps = [
         "board",
         "drivers",
-    ]
-    if (HAVE_PRODUCT_CONFIG) {
+      ]
+      if (HAVE_PRODUCT_CONFIG) {
         deps += [ "$product_path/hdf_config" ]
-    } else {
+      } else {
         deps += [ "hdf_config" ]
+      }
     }
-    }
-
+    
     config("public") {
-    configs = [
+      configs = [
         "board:public",
         "drivers:public",
-    ]
+      ]
     }
     ```
 2. 在//device/board/bearpi/bearpi_hm_micro/liteos_a/board中新建BUILD.gn，添加代码如下。将os_adapt.c内核启动相关代码编译进系统。
     ```
     import("//kernel/liteos_a/liteos.gni")
-
+    
     module_name = "bsp_config"
-
+    
     kernel_module(module_name) {
-    sources = []
-    if (defined(LOSCFG_PLATFORM_ADAPT)) {
+      sources = []
+      if (defined(LOSCFG_PLATFORM_ADAPT)) {
         sources += [ "os_adapt/os_adapt.c" ]
+      }
     }
-    }
-
+    
     config("public") {
-    include_dirs = [ "." ]
-    include_dirs += [ "include" ]
-    include_dirs += [ "$LITEOSTOPDIR/drivers/block/disk/include" ]
-    include_dirs +=
-        [ "$LITEOSTOPDIR/../../drivers/adapter/khdf/liteos/osal/include" ]
+      include_dirs = [ "." ]
+      include_dirs += [ "include" ]
+      include_dirs += [ "$LITEOSTOPDIR/drivers/block/disk/include" ]
+      include_dirs +=
+          [ "$LITEOSTOPDIR/../../drivers/adapter/khdf/liteos/osal/include" ]
     }
     ```
 3. 在//device/board/bearpi/bearpi_hm_micro/liteos_a/drivers中新建BUILD.gn，添加代码如下，将device/soc/st/common/platform路径下的HDF驱动编译进系统。
     ```
     import("//drivers/adapter/khdf/liteos/hdf.gni")
-
+    
     group("drivers") {
-    public_deps = [ "//device/soc/st/common/platform:drivers" ]
+      public_deps = [ "//device/soc/st/common/platform:drivers" ]
     }
-
+    
     config("public") {
-    configs = [ "//device/soc/st/common/platform:public" ]
+      configs = [ "//device/soc/st/common/platform:public" ]
     }
-
+    
     ```
 4. 在//vendor/bearpi/bearpi_hm_micro/hdf_config中新建BUILD.gn，添加代码如下，将HCS配置文件编译进系统。
     ```
     module_switch = defined(LOSCFG_DRIVERS_HDF) && !defined(LOSCFG_DRIVERS_HDF_TEST)
     module_name = "libhdf_config"
     hdf_driver(module_name) {
-    hcs_sources = [ "hdf.hcs" ]
+      hcs_sources = [ "hdf.hcs" ]
     }
-
+    
     group("hdf_config") {
-    public_deps = [ ":$module_name" ]
-    deps = [
+      public_deps = [ ":$module_name" ]
+      deps = [
         "hdf_test",
         "hdf_test/hcs_macro_test",
-    ]
+      ]
     }
     ```
 ### 内核启动适配