T4/serdes: fix the serdes clock frequency

Reverse the bit sequence to set and display serdes clock frequency
correctly. The correct bit maps in BRDCFG2 are
0	1	2	3	4	5	6	7
S1RATE[1:0]	S2RATE[1:0] 	S3RATE[1:0] 	S4RATE[1:0]
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>

board/freescale/t4qds/t4qds.c

@@ -110,7 +110,7 @@ int checkboard(void)
 	for (i = 0; i < MAX_SERDES; i++) {
 		static const char *freq[] = {
 			"100", "125", "156.25", "161.1328125"};
-		unsigned int clock = (sw >> (2 * i)) & 3;
+		unsigned int clock = (sw >> (6 - 2 * i)) & 3;
 
 		printf("SERDES%u=%sMHz ", i+1, freq[clock]);
 	}
@@ -357,7 +357,7 @@ int misc_init_r(void)
 
 	sw = QIXIS_READ(brdcfg[2]);
 	for (i = 0; i < MAX_SERDES; i++) {
-		unsigned int clock = (sw >> (2 * i)) & 3;
+		unsigned int clock = (sw >> (6 - 2 * i)) & 3;
 		switch (clock) {
 		case 0:
 			actual[i] = SRDS_PLLCR0_RFCK_SEL_100;