mimxrt10xx: Add fsl_flexcan driver source only if supported

For instance, i.MX RT1011 and 1015 don't have CAN interfaces

Author: SamantazFox

ports/mimxrt10xx/Makefile

@@ -120,13 +120,16 @@ SRC_SDK := \
 	drivers/snvs_hp/fsl_snvs_hp.c \
 	drivers/snvs_lp/fsl_snvs_lp.c \
 	drivers/trng/fsl_trng.c \
-	drivers/flexcan/fsl_flexcan.c \
 
 ifeq ($(CIRCUITPY_ANALOGIO), 1)
 SRC_SDK +=	drivers/adc_12b1msps_sar/fsl_adc.c \
 	drivers/tempmon/fsl_tempmon.c
 endif
 
+ifeq ($(CIRCUITPY_CANIO), 1)
+SRC_SDK +=	drivers/flexcan/fsl_flexcan.c
+endif
+
 ifeq ($(CHIP_FAMILY), MIMXRT1176)
 SRC_SDK += devices/$(CHIP_FAMILY)/drivers/fsl_anatop_ai.c \
 	devices/$(CHIP_FAMILY)/drivers/fsl_dcdc.c \