nxuart/fw/: renamed "uart" to "nxuart" as well

- uart.c: renamed to nxuart.c
- Makefile: abstracted project name through $(NAME)

nxuart/fw/nxuart.c

@@ -0,0 +1,19 @@
+#include <stdint.h>
+
+#include <avr/io.h>
+
+#define	F_CPU	1000000UL
+#include <util/delay.h>
+
+
+#define	LED	2	/* PD2 */
+
+
+int main(void)
+{
+	DDRD = 1 << LED;
+	while (1) {
+		PORTD ^= 1 << LED;
+		_delay_ms(50);
+	}
+}