media: atomisp: Fix EMBEDDED_FUNCTION_NAME warning

Use the automatically defined __func__ macro instead of the function name,
so it stays correct when the function is renamed.

Link: https://lore.kernel.org/linux-media/20201214110156.6152-4-Philipp.Gerlesberger@fau.deCo-developed-by: Andrey Khlopkov <ij72uhux@stud.informatik.uni-erlangen.de>
Signed-off-by: Andrey Khlopkov <ij72uhux@stud.informatik.uni-erlangen.de>
Signed-off-by: Philipp Gerlesberger <Philipp.Gerlesberger@fau.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/staging/media/atomisp/pci/runtime/rmgr/src/rmgr_vbuf.c

@@ -107,8 +107,7 @@ void ia_css_rmgr_refcount_retain_vbuf(struct ia_css_rmgr_vbuf_handle **handle)
 void ia_css_rmgr_refcount_release_vbuf(struct ia_css_rmgr_vbuf_handle **handle)
 {
 	if ((!handle) || ((*handle) == NULL) || (((*handle)->count) == 0)) {
-		ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR,
-				    "ia_css_rmgr_refcount_release_vbuf() invalid arguments!\n");
+		ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR, "%s invalid arguments!\n", __func__);
 		return;
 	}
 	/* decrease reference count */
@@ -163,10 +162,9 @@ void ia_css_rmgr_uninit_vbuf(struct ia_css_rmgr_vbuf_pool *pool)
 {
 	u32 i;
 
-	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE, "ia_css_rmgr_uninit_vbuf()\n");
+	ia_css_debug_dtrace(IA_CSS_DEBUG_TRACE, "%s\n", __func__);
 	if (!pool) {
-		ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR,
-				    "ia_css_rmgr_uninit_vbuf(): NULL argument\n");
+		ia_css_debug_dtrace(IA_CSS_DEBUG_ERROR, "%s NULL argument\n", __func__);
 		return;
 	}
 	if (pool->handles) {