Fix axis CS sanity check (#16271)

Marlin/src/inc/SanityCheck.h

 /**
  * Check existing CS pins against enabled TMC SPI drivers.
  */
-#define INVALID_TMC_SPI(ST) (AXIS_HAS_SPI && !PIN_EXISTS(ST##_CS))
+#define INVALID_TMC_SPI(ST) (AXIS_HAS_SPI(ST) && !PIN_EXISTS(ST##_CS))
 #if INVALID_TMC_SPI(X)
   #error "An SPI driven TMC driver on X requires X_CS_PIN."
 #elif INVALID_TMC_SPI(X2)