General cleanup, use _BV

Marlin/src/HAL/SAMD51/fastio.h

@@ -31,7 +31,7 @@
  */
 
 #ifndef MASK
-  #define MASK(PIN) (1 << PIN)
+  #define MASK(PIN) _BV(PIN)
 #endif
 
 /**

Marlin/src/HAL/SAMD51/timers.cpp

@@ -157,7 +157,7 @@ void HAL_timer_disable_interrupt(const uint8_t timer_num) {
 
 // missing from CMSIS: Check if interrupt is enabled or not
 static bool NVIC_GetEnabledIRQ(IRQn_Type IRQn) {
-  return (NVIC->ISER[(uint32_t)(IRQn) >> 5] & (1 << ((uint32_t)(IRQn) & 0x1F))) != 0;
+  return TEST(NVIC->ISER[uint32_t(IRQn) >> 5], uint32_t(IRQn) & 0x1F);
 }
 
 bool HAL_timer_interrupt_enabled(const uint8_t timer_num) {