targets: clock: change default core clock to 528M

change the clock config of the RT1050 to set the default core clock to
528M

Signed-off-by: timwang <tim.wang@nxp.com>

Author: Tim-Wang38

targets/TARGET_NXP/TARGET_MCUXpresso_MCUS/TARGET_MIMXRT1050/TARGET_EVK/fsl_clock_config.c

@@ -139,7 +139,7 @@ called_from_default_init: true
  * Variables for BOARD_BootClockRUN configuration
  ******************************************************************************/
 const clock_arm_pll_config_t armPllConfig_BOARD_BootClockRUN = {
-    .loopDivider = 100, /* PLL loop divider, Fout = Fin * 50 */
+    .loopDivider = 88, /* PLL loop divider, Fout = Fin * 44 */
     .src         = 0,   /* Bypass clock source, 0 - OSC 24M, 1 - CLK1_P and CLK1_N */
 };
 const clock_sys_pll_config_t sysPllConfig_BOARD_BootClockRUN = {