phyboard.c: fix whitespace error

Signed-off-by: Alex Tereschenko <alext.mkrs@gmail.com>

src/arm/phyboard.c

@@ -329,7 +329,7 @@ mraa_phyboard()
     b->pins[33].gpio.parent_id = 0;
     b->pins[33].gpio.mux_total = 0;
     b->pins[33].uart.mux_total = 0;
-    
+
     strncpy(b->pins[34].name, "GND", MRAA_PIN_NAME_SIZE);
     b->pins[34].capabilities = (mraa_pincapabilities_t){ 1, 0, 0, 0, 0, 0, 0, 0 };