Kconfig: use named pins for SD select and enable signals.

sys/pic32/max32/Config

@@ -43,20 +43,20 @@ options         "CONSOLE_DEVICE=tty0"       # /dev/tty0
 controller      spi2                        # SD card
 
 # microSD card
-disk            sd0     at spi2 flags 0x3e  # select pin RC14
+device          sd0     at spi2 pin RC14    # select pin
 options         "SD0_MHZ=10"                # speed 10 MHz
 options         "SD0_PORT=2"                # at spi2               TODO: delete
 options         "SD0_CS_PORT=TRISC"         # for chip select...    TODO: use flags
 options         "SD0_CS_PIN=14"             # ...use pin RC14       TODO: use flags
 
 # General purpose I/O ports
-device          gpio0
+device          gpio
 
 # ADC driver
-device          adc0
+device          adc
 
 # PWM driver
-device          pwm0
+device          pwm
 
 # Skeleton driver
-#device         skel0
+#device         skel