ram: rk3399: Mark existing prints via RAM_ROCKCHIP_DEBUG

Right now all these debug statements are printing on the
console to make sure proper dram initialization happens.  

Mark them into RAM_ROCKCHIP_DEBUG would be more meaningful
and work like before since the RAM_ROCKCHIP_DEBUG is by
default yet.

No functionality changes.
Signed-off-by: NJagan Teki <jagan@amarulasolutions.com>
Reviewed-by: NKever Yang <kever.yang@rock-chips.com>

drivers/ram/rockchip/sdram_rk3399.c

@@ -2551,8 +2551,10 @@ static int lpddr4_set_rate(struct dram_info *dram,
 		lpddr4_set_ctl(dram, params, ctl_fn,
 			       dfs_cfgs_lpddr4[ctl_fn].base.ddr_freq);
 
-		printf("%s: change freq to %d mhz %d, %d\n", __func__,
-		       dfs_cfgs_lpddr4[ctl_fn].base.ddr_freq, ctl_fn, phy_fn);
+		if (IS_ENABLED(CONFIG_RAM_ROCKCHIP_DEBUG))
+			printf("%s: change freq to %d mhz %d, %d\n", __func__,
+			       dfs_cfgs_lpddr4[ctl_fn].base.ddr_freq,
+			       ctl_fn, phy_fn);
 	}
 
 	return 0;
@@ -2966,8 +2968,10 @@ static int sdram_init(struct dram_info *dram,
 			params->base.num_channels++;
 		}
 
-		printf("Channel ");
-		printf(channel ? "1: " : "0: ");
+		if (IS_ENABLED(CONFIG_RAM_ROCKCHIP_DEBUG)) {
+			printf("Channel ");
+			printf(channel ? "1: " : "0: ");
+		}
 
 		if (channel == 0)
 			set_ddr_stride(dram->pmusgrf, 0x17);