pcm052: board: vybrid: Update the board name for BK4 device

This commit provides distinction between PCM052 and BK4.

Signed-off-by: Lukasz Majewski <lukma@denx.de>

board/phytec/pcm052/pcm052.c

@@ -573,7 +573,10 @@ int board_init(void)
 
 int checkboard(void)
 {
+#ifdef CONFIG_TARGET_BK4R1
+	puts("Board: BK4r1 (L333)\n");
+#else
 	puts("Board: PCM-052\n");
-
+#endif
 	return 0;
 }