[NFC] target/riscv: simplify code with MAX macros

slightly improves readability

src/target/riscv/riscv-013.c

@@ -3566,7 +3566,7 @@ read_memory_abstract(struct target *target, target_addr_t address,
 	uint8_t *p = buffer;
 	int result = ERROR_OK;
 	bool updateaddr = true;
-	unsigned int width32 = (width < 32) ? 32 : width;
+	unsigned int width32 = MAX(width, 32);
 	for (uint32_t c = 0; c < count; c++) {
 		/* Update the address if it is the first time or aampostincrement is not supported by the target. */
 		if (updateaddr) {

src/target/riscv/riscv.c

@@ -4086,7 +4086,7 @@ static int parse_ranges(struct list_head *ranges, const char *tcl_arg, const cha
 			return ERROR_COMMAND_SYNTAX_ERROR;
 		}
 
-		high = high > low ? high : low;
+		high = MAX(high, low);
 
 		if (high > max_val) {
 			LOG_ERROR("Cannot expose %s register number %u, maximum allowed value is %u.", reg_type, high, max_val);