clk: mvebu: ap806: be more explicit on what SaR is

"SaR" means Sample at Reset. DIP switches can be changed on the board,
their states at reset time is available through a register read.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20190805100310.29048-6-miquel.raynal@bootlin.comSigned-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/mvebu/ap806-system-controller.c

@@ -89,7 +89,7 @@ static int ap806_syscon_common_probe(struct platform_device *pdev,
 		cpuclk_freq = 600;
 		break;
 	default:
-		dev_err(dev, "invalid SAR value\n");
+		dev_err(dev, "invalid Sample at Reset value\n");
 		return -EINVAL;
 	}