usb: xhci-mtk: add optional frame count clock

Add optional clock frmcnt_ck used on 4nm or advanced process SoC

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/20230407062406.12575-2-chunfeng.yun@mediatek.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-mtk.c

@@ -398,6 +398,7 @@ static int xhci_mtk_clks_get(struct xhci_hcd_mtk *mtk)
 	clks[2].id = "ref_ck";
 	clks[3].id = "mcu_ck";
 	clks[4].id = "dma_ck";
+	clks[5].id = "frmcnt_ck";
 
 	return devm_clk_bulk_get_optional(mtk->dev, BULK_CLKS_NUM, clks);
 }

drivers/usb/host/xhci-mtk.h

@@ -15,7 +15,7 @@
 
 #include "xhci.h"
 
-#define BULK_CLKS_NUM	5
+#define BULK_CLKS_NUM	6
 #define BULK_VREGS_NUM	2
 
 /* support at most 64 ep, use 32 size hash table */