fix(imx8m): handle 3734 in addition to 3733 and 3732 MTps rates

The new MX8M DDR tool 3.31 now generates a programming file which uses
data rate 3734 instead of 3733 or 3732 . Handle another rounding option .

Signed-off-by: Marek Vasut <marex@denx.de>
Change-Id: I97a69650c12d78dfff9dcdb23e27fd6590f57fc0
diff --git a/plat/imx/imx8m/ddr/clock.c b/plat/imx/imx8m/ddr/clock.c
index 31f2f56..4d0b261 100644
--- a/plat/imx/imx8m/ddr/clock.c
+++ b/plat/imx/imx8m/ddr/clock.c
@@ -91,6 +91,7 @@
 	case 4000:
 		mmio_write_32(DRAM_PLL_CTRL + 0x4, (250 << 12) | (3 << 4) | 1);
 		break;
+	case 3734:
 	case 3733:
 	case 3732:
 		mmio_write_32(DRAM_PLL_CTRL + 0x4, (311 << 12) | (4 << 4) | 1);