Disabling cache read buffer. (#438)

* Disabling cache read buffer.

* clang-format bot reformatting.

---------

Co-authored-by: kevin-gillespie <[email protected]>
MSDK-Commit: a6f724c1fff9af68fe80d3a8b27cf709e162447f

Author: kevin-gillespie

MAX/Libraries/CMSIS/Device/Maxim/MAX32690/Source/system_max32690.c

@@ -128,6 +128,10 @@ __weak void SystemInit(void)
     SCB->VTOR = (uint32_t)__isr_vector;
 #endif /* __CC_ARM || __GNUC__ */
 
+    *(volatile uint32_t *)0x40000c00 = 1; // Enable test mode
+    *(volatile uint32_t *)0x4000040c = (1 << 6); // Disable cache read buffer
+    *(volatile uint32_t *)0x40000c00 = 0; // Disable test mode
+
     MXC_ICC_Enable(MXC_ICC0);
     MXC_ICC_Disable(MXC_ICC0);
     MXC_ICC_Enable(MXC_ICC0);