SPI clock fix for KL05Z and KL46Z

Author: Sissors

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KL05Z/spi_api.c

@@ -115,7 +115,7 @@ void spi_frequency(spi_t *obj, int hz) {
     uint8_t  ref_prescaler = 0;
 
     // bus clk
-    uint32_t PCLK = 23986176u;
+    uint32_t PCLK = SystemCoreClock / (((SIM->CLKDIV1 & SIM_CLKDIV1_OUTDIV4_MASK) >> SIM_CLKDIV1_OUTDIV4_SHIFT) + 1);
     uint8_t prescaler = 1;
     uint8_t divisor = 2;
 

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KL46Z/spi_api.c

@@ -158,7 +158,7 @@ void spi_frequency(spi_t *obj, int hz) {
     uint8_t  ref_prescaler = 0;
 
     // bus clk
-    uint32_t PCLK = 48000000u;
+    uint32_t PCLK = SystemCoreClock / (((SIM->CLKDIV1 & SIM_CLKDIV1_OUTDIV4_MASK) >> SIM_CLKDIV1_OUTDIV4_SHIFT) + 1);
     uint8_t prescaler = 1;
     uint8_t divisor = 2;