powerpc/t208x: fix macro CONFIG_SYS_FSL_NUM_USB_CTRLS

CONFIG_SYS_FSL_NUM_USB_CTRLS is no longer used,
update it to new CONFIG_USB_MAX_CONTROLLER_COUNT.

Signed-off-by: Shengzhou Liu <Shengzhou.Liu@freescale.com>

arch/powerpc/include/asm/config_mpc85xx.h

@@ -746,7 +746,7 @@ defined(CONFIG_PPC_T1020) || defined(CONFIG_PPC_T1022)
 #define CONFIG_SYS_NUM_FM1_DTSEC	6
 #define CONFIG_SYS_NUM_FM1_10GEC	2
 #endif
-#define CONFIG_SYS_FSL_NUM_USB_CTRLS	2
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 2
 #define CONFIG_NUM_DDR_CONTROLLERS	1
 #define CONFIG_PME_PLAT_CLK_DIV		1
 #define CONFIG_SYS_PME_CLK		CONFIG_PME_PLAT_CLK_DIV