mmc: renesas-sdhi: Flag non-standard SDnH handling for V3M

V3M handles SDnH differently than other Gen3 SoCs, so let's add a
separate entry for that. This will allow better SDnH handling in the
future.

Based on Linux commit 627151b4966f ("mmc: renesas_sdhi: Flag
non-standard SDnH handling for V3M") by Wolfram Sang

Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
diff --git a/drivers/mmc/tmio-common.h b/drivers/mmc/tmio-common.h
index 59d5a0e..e517ed9 100644
--- a/drivers/mmc/tmio-common.h
+++ b/drivers/mmc/tmio-common.h
@@ -151,6 +151,7 @@
 	u8				hs400_bad_tap;
 	const u8			*adjust_hs400_calib_table;
 	u32			quirks;
+	bool				needs_clkh_fallback;
 #endif
 	ulong (*clk_get_rate)(struct tmio_sd_priv *);
 };