tape autocalibration code is dangerous on 1MHz, disable it for slower machines

src/kernal/tape/tape_normal_get_bit.s

@@ -22,13 +22,16 @@ tape_normal_get_bit:
 
 	; First impulse was short, second should be medium
 
+!ifdef HAS_TAPE_AUTOCALIBRATE {
 	jsr tape_normal_calibrate_after_S
+}
 
 	jsr tape_common_get_pulse
 	bcs tape_normal_get_bit_error
 
+!ifdef HAS_TAPE_AUTOCALIBRATE {
 	jsr tape_normal_calibrate_after_M
-
+}
 	; We have a bit '0'
 
 	lda #$00
@@ -46,13 +49,16 @@ tape_normal_get_bit_1:
 
 	; First impulse was medium, second should be short
 
+!ifdef HAS_TAPE_AUTOCALIBRATE {
 	jsr tape_normal_calibrate_after_M
+}
 
 	jsr tape_common_get_pulse
 	bcc tape_normal_get_bit_error
 
+!ifdef HAS_TAPE_AUTOCALIBRATE {
 	jsr tape_normal_calibrate_after_S
-
+}
 	; We have a bit '1'
 
 	clc