sparc: add asm/stat.h to UAPI compile-test coverage

asm/stat.h is currently excluded from the UAPI compile-test for
ARCH=sparc because of the errors like follows:

  In file included from <command-line>:
  ./usr/include/asm/stat.h:11:2: error: unknown type name 'ino_t'
     11 |  ino_t   st_ino;
        |  ^~~~~
    HDRTEST usr/include/asm/param.h
  ./usr/include/asm/stat.h:12:2: error: unknown type name 'mode_t'
     12 |  mode_t  st_mode;
        |  ^~~~~~
  ./usr/include/asm/stat.h:14:2: error: unknown type name 'uid_t'
     14 |  uid_t   st_uid;
        |  ^~~~~
  ./usr/include/asm/stat.h:15:2: error: unknown type name 'gid_t'
     15 |  gid_t   st_gid;
        |  ^~~~~

The errors can be fixed by prefixing the types with __kernel_.

Then, remove the no-header-test entry from user/include/Makefile.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>

arch/sparc/include/uapi/asm/stat.h

@@ -8,11 +8,11 @@
 /* 64 bit sparc */
 struct stat {
 	unsigned int st_dev;
-	ino_t   st_ino;
-	mode_t  st_mode;
+	__kernel_ino_t st_ino;
+	__kernel_mode_t st_mode;
 	short   st_nlink;
-	uid_t   st_uid;
-	gid_t   st_gid;
+	__kernel_uid_t st_uid;
+	__kernel_gid_t st_gid;
 	unsigned int st_rdev;
 	long    st_size;
 	long    st_atime;
@@ -51,8 +51,8 @@ struct stat64 {
 /* 32 bit sparc */
 struct stat {
 	unsigned short	st_dev;
-	ino_t		st_ino;
-	mode_t		st_mode;
+	__kernel_ino_t	st_ino;
+	__kernel_mode_t	st_mode;
 	short		st_nlink;
 	unsigned short	st_uid;
 	unsigned short	st_gid;

usr/include/Makefile

@@ -70,7 +70,6 @@ no-header-test += linux/bpf_perf_event.h
 endif
 
 ifeq ($(SRCARCH),sparc)
-no-header-test += asm/stat.h
 no-header-test += asm/uctx.h
 no-header-test += asm/fbio.h
 endif