1.remove redundant headfile in kernel, such as:
  compiler.h;debug.h;automount.h;inode.h;syslog.h;net.h;
2.split fs.h to file.h and driver.h
3.move vnode.h and path_cache.h to vfs/include
4.remove redundant interface and defines

close: #I3RTNR
Signed-off-by: Nmucor <mucorwang@gmail.com>

Merge pull request !14 from JING/link

利用fatfs目录项中的保留字段，作为符号链接的标识符。

close #I3V8D1
Signed-off-by: Nchenjing <chenjing139@huawei.com>
Change-Id: I69fc4c668ed8377364dddd9bd28ebeef100d9b14

Merge pull request !13 from Far/master

Merge pull request !12 from Far/fatfs

Close #I3N2LW

FAT12/FAT16 partition has no FSINFO sector storing the free cluster number,
so scanning the FAT is necessary to get the free clusters nums.

Close #I3Q0VS

Merge pull request !10 from JING/master

Print log message when an exFat filesystem is recognized.

Close #I3O8IF

Merge pull request !8 from Caoruihong/dropxmode

Merge pull request !9 from Caoruihong/readme

Change-Id: I9a6232ca0fd51a590073bcb9dae3c34b72db9619

Change-Id: Iae871ce706bef622350954601de615c7b79046a5

Merge pull request !7 from JING/master

Bug: #I3NEVN
Test:

Merge pull request !6 from JING/master

Bug: #I3J1IC
Test:

Merge pull request !3 from 马明帅/add_issus_pr_template_for_master

Merge pull request !5 from ysy4tc3/dev

1. Before formating, user los_disk_cache_clear to clear the Bcache;
2. FATFS readdir use dir_read_massive to use the Bcache write block to improve readdir performance

Change-Id: I2820b86f533377b40b823e45e5c8734e8f115c7f

Merge pull request !2 from 野生毛霉君/noEmployeeNum_ChangeID_13306396_wangchenyang

Feature or Bugfix:Feature
Binary Source:Huawei
PrivateCode(Yes/No):Yes

Change-Id: I175d2648bc6f9078c34de2c0a5c93fda10b86c47
ChangeID:13306396

Merge pull request !1 from JING/chenjing_20210108153725

Reviewed-by: shenwei