cmd: eeprom: don't truncate target address at 32-bit

On 64-bit platforms where int is 32-bit wide, the eeprom command
parse_numeric_param() routine truncates the memory address parameter to
the lower 32-bit. Make parse_numeric_param() return long to allow
read/write of addresses beyond the lower 4GB.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
diff --git a/cmd/eeprom.c b/cmd/eeprom.c
index fc0d444..0b6ca8c 100644
--- a/cmd/eeprom.c
+++ b/cmd/eeprom.c
@@ -200,10 +200,10 @@
 	return ret;
 }
 
-static int parse_numeric_param(char *str)
+static long parse_numeric_param(char *str)
 {
 	char *endptr;
-	int value = simple_strtol(str, &endptr, 16);
+	long value = simple_strtol(str, &endptr, 16);
 
 	return (*endptr != '\0') ? -1 : value;
 }