board:keymile: remove unnecessary double braces

Clang interpretes an if condition like  "if ((a = b) == NULL)
as it tries to assign a value in a statement. Hence if you do
"if ((something)) it warns you that you might be confused.
Hence drop the double braces for plane if statements.

cc: Holger Brunck <holger.brunck@keymile.com>
Signed-off-by: Jeroen Hofstee <jeroen@myspectrum.nl>

board/keymile/common/ivm.c

@@ -120,7 +120,7 @@ static int ivm_findinventorystring(int type,
 
 	/* Look for the requested number of CR. */
 	while ((cr != nr) && (addr < INVENTORYDATASIZE)) {
-		if ((buf[addr] == '\r'))
+		if (buf[addr] == '\r')
 			cr++;
 		addr++;
 	}