clk: at91: sam9x60: support only two programmable clocks

According to datasheet (Chapter 29.16.13, PMC Programmable Clock Register)
there are only two programmable clocks on SAM9X60.

Fixes: 01e2113 ("clk: at91: add sam9x60 pmc driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/1602686072-28296-1-git-send-email-claudiu.beznea@microchip.com
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Author: claudiubeznea

drivers/clk/at91/sam9x60.c

@@ -248,7 +248,7 @@ static void __init sam9x60_pmc_setup(struct device_node *np)
 	parent_names[3] = "masterck";
 	parent_names[4] = "pllack";
 	parent_names[5] = "upllck";
-	for (i = 0; i < 8; i++) {
+	for (i = 0; i < 2; i++) {
 		char name[6];
 
 		snprintf(name, sizeof(name), "prog%d", i);