plat: imx8m: Fix get_freq_info when bypass not supported

On imx8mq B0 DRAM PLL bypass is not supported due to erratas. Report
this information upwards so that OS freq switch code doesn't mistakenly
disable DRAM pll.
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>

plat/imx/common/imx8m/dram.c

@@ -277,9 +277,17 @@ int dram_dvfs_get_freq_info(void *handle, u_register_t index)
 	switch (index) {
 	case 0: SMC_RET4(handle, dram_info.timing_info->fsp_table[0],
 				1, 0, 5);
-	case 1: SMC_RET4(handle, dram_info.timing_info->fsp_table[1],
+	case 1:
+		if (!bypass_mode_supported)
+			SMC_RET4(handle, dram_info.timing_info->fsp_table[1],
+					1, 0, 0);
+		SMC_RET4(handle, dram_info.timing_info->fsp_table[1],
 				2, 2, 4);
-	case 2: SMC_RET4(handle, dram_info.timing_info->fsp_table[2],
+	case 2:
+		if (!bypass_mode_supported)
+			SMC_RET4(handle, dram_info.timing_info->fsp_table[2],
+					1, 0, 0);
+		SMC_RET4(handle, dram_info.timing_info->fsp_table[2],
 				2, 3, 3);
 	case 3: SMC_RET4(handle, dram_info.timing_info->fsp_table[3],
 				1, 0, 0);