loader: rename loader_open_render_node() to loader_open_render_node_platform_device()

This function ignore devices that are not on the platform bus. So rename
it to better reflect that.

Signed-off-by: Leandro Ribeiro <leandro.ribeiro@collabora.com>
Reviewed-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Daniel Stone <daniels@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24825>

src/gallium/drivers/tegra/tegra_screen.c

@@ -579,7 +579,7 @@ tegra_screen_create(int fd)
 
    screen->fd = fd;
 
-   screen->gpu_fd = loader_open_render_node("nouveau");
+   screen->gpu_fd = loader_open_render_node_platform_device("nouveau");
    if (screen->gpu_fd < 0) {
       if (errno != ENOENT)
          fprintf(stderr, "failed to open GPU device: %s\n", strerror(errno));

src/loader/loader.c

@@ -133,7 +133,7 @@ iris_predicate(int fd)
 }
 
 int
-loader_open_render_node(const char *name)
+loader_open_render_node_platform_device(const char *name)
 {
    drmDevicePtr devices[MAX_DRM_DEVICES], device;
    int i, num_devices, fd = -1;

src/loader/loader.h

@@ -44,7 +44,7 @@ int
 loader_open_device(const char *);
 
 int
-loader_open_render_node(const char *name);
+loader_open_render_node_platform_device(const char *name);
 
 char *
 loader_get_render_node(dev_t device);