module: hal_sifli: Overwrite SiFli HAL delay function with k_sleep

SiFli HAL is using HAL_Delay_us to delay for certain microseconds.
This is a weak function. I overwrites this function with Zephyr k_sleep.

Signed-off-by: Gang He <[email protected]>

Author: Gang He

modules/hal_sifli/hal.c

@@ -4,6 +4,12 @@
  */
 
 #include <stdint.h>
+#include <zephyr/kernel.h>
 
 /* System clock (48MHz by RC48 at boot) */
 uint32_t SystemCoreClock = 48000000UL;
+
+void HAL_Delay_us(uint32_t us)
+{
+	k_sleep(K_USEC(us));
+}