eeprog: Fix ambiguous parentheses

Better separate the function call and the result test, to make the
code clearer and unambiguous.

Reported by David Binderman.

CHANGES

@@ -10,6 +10,7 @@ master
                 Decode physical characteristics of DDR4
                 Documentation update for DDR4
                 Verify the CRC of DDR4 data block 1
+  eeprog: Fix ambiguous parentheses
 
 4.0 (2017-10-30)
   tools: Fix build with recent compilers (gcc 4.6+)

eeprog/24cXX.c

@@ -87,7 +87,8 @@ int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
 		return -1;
 
 	// get funcs list
-	if((r = ioctl(fd, I2C_FUNCS, &funcs) < 0))
+	r = ioctl(fd, I2C_FUNCS, &funcs);
+	if (r < 0)
 		return r;
 
 	
@@ -100,7 +101,8 @@ int eeprom_open(char *dev_fqn, int addr, int type, struct eeprom* e)
 	CHECK_I2C_FUNC( funcs, I2C_FUNC_SMBUS_WRITE_WORD_DATA );
 
 	// set working device
-	if( ( r = ioctl(fd, I2C_SLAVE, addr)) < 0)
+	r = ioctl(fd, I2C_SLAVE, addr);
+	if (r < 0)
 		return r;
 	e->fd = fd;
 	e->addr = addr;