net: lwm2m: remove checks for long int > MAX_INT

Per Coverity report, the evaluation of long int v > MAX_INT is
always false and considered a CONSTANT_EXPRESS_RESULT issue.

Removed these checks from:
atof32()
lwm2m_write_attr_handler()

Fixes: #12317
Fixes: #12320

Signed-off-by: Michael Scott <[email protected]>

Author: mike-scott

subsys/net/lib/lwm2m/lwm2m_engine.c

@@ -848,7 +848,7 @@ static int atof32(const char *input, float32_value_t *out)
 
 	errno = 0;
 	val = strtol(buf, &end, 10);
-	if (errno || *end || val > INT_MAX || val < INT_MIN) {
+	if (errno || *end || val < INT_MIN) {
 		return -EINVAL;
 	}
 
@@ -2394,7 +2394,7 @@ static int lwm2m_write_attr_handler(struct lwm2m_engine_obj *obj,
 			 */
 			errno = 0;
 			v = strtol(opt_buf, &end, 10);
-			if (errno || *end || v > INT_MAX || v < 0) {
+			if (errno || *end || v < 0) {
 				ret = -EINVAL;
 			}