Rename api-hal to furi-hal (#629)

firmware/targets/f6/furi-hal/furi-hal-clock.h

@@ -0,0 +1,10 @@
+#pragma once
+
+/** Initialize clocks */
+void furi_hal_clock_init();
+
+/** Switch to HSI clock */
+void furi_hal_clock_switch_to_hsi();
+
+/** Switch to PLL clock */
+void furi_hal_clock_switch_to_pll();