clk: sifive: append missing \n to messages

If multiple messages are written, line-feeds improve the readability.

Fixes: c40b6df87fc0 ("clk: Add SiFive FU540 PRCI clock driver")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Sean Anderson <seanga2@gmail.com>
diff --git a/drivers/clk/analogbits/wrpll-cln28hpc.c b/drivers/clk/analogbits/wrpll-cln28hpc.c
index a3cb109..537c696 100644
--- a/drivers/clk/analogbits/wrpll-cln28hpc.c
+++ b/drivers/clk/analogbits/wrpll-cln28hpc.c
@@ -81,7 +81,7 @@
 {
 	if (post_divr_freq < MIN_POST_DIVR_FREQ ||
 	    post_divr_freq > MAX_POST_DIVR_FREQ) {
-		WARN(1, "%s: post-divider reference freq out of range: %lu",
+		WARN(1, "%s: post-divider reference freq out of range: %lu\n",
 		     __func__, post_divr_freq);
 		return -ERANGE;
 	}
@@ -229,7 +229,7 @@
 	int range;
 
 	if (c->flags == 0) {
-		WARN(1, "%s called with uninitialized PLL config", __func__);
+		WARN(1, "%s called with uninitialized PLL config\n", __func__);
 		return -EINVAL;
 	}
 
@@ -335,7 +335,7 @@
 	u64 n;
 
 	if (c->flags & WRPLL_FLAGS_EXT_FEEDBACK_MASK) {
-		WARN(1, "external feedback mode not yet supported");
+		WARN(1, "external feedback mode not yet supported\n");
 		return ULONG_MAX;
 	}