v4l2: v4l2_compat: Fix redirect from __open(at)64_2()

To avoid confusion, have `__open64_2()` and `__openat64_2()` delegate to
`open64()` and `openat64()`, respectively, instead of `open()` and
`openat()`.

This does not change the behaviour because
`V4L2CompatManager::instance()->openat()` calls `openat64()` internally,
and that adds the `O_LARGEFILE` flag unconditionally.

Fixes: 1023107b64 ("v4l2: v4l2_compat: Intercept open64, openat64, and mmap64")
Signed-off-by: Barnabás Pőcze <pobrn@protonmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/v4l2/v4l2_compat.cpp

@@ -59,7 +59,7 @@ LIBCAMERA_PUBLIC int open64(const char *path, int oflag, ...)
 
 LIBCAMERA_PUBLIC int __open64_2(const char *path, int oflag)
 {
-	return open(path, oflag);
+	return open64(path, oflag);
 }
 #endif
 
@@ -90,7 +90,7 @@ LIBCAMERA_PUBLIC int openat64(int dirfd, const char *path, int oflag, ...)
 
 LIBCAMERA_PUBLIC int __openat64_2(int dirfd, const char *path, int oflag)
 {
-	return openat(dirfd, path, oflag);
+	return openat64(dirfd, path, oflag);
 }
 #endif