vc/amd/opensil/genoa_poc/memmap: use unsigned long for resource index

Use an unsigned long as resource index type instead of an int to match
the data type used for the index in the resource struct and the
functions to report the resources.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Iccc2e0556ce8688d933506e0db5cc4b83c66ac76
Reviewed-on: https://review.coreboot.org/c/coreboot/+/80265
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Varshit Pandya <pandyavarshit@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/amd/opensil/genoa_poc/memmap.c

@@ -84,7 +84,7 @@ static void print_memory_holes(void *unused)
 BOOT_STATE_INIT_ENTRY(BS_DEV_RESOURCES, BS_ON_ENTRY, print_memory_holes, NULL);
 
 // This assumes holes are allocated
-int add_opensil_memmap(struct device *dev, int idx)
+unsigned long add_opensil_memmap(struct device *dev, unsigned long idx)
 {
 	ram_from_to(dev, idx++, 0, 0xa0000);
 	mmio_from_to(dev, idx++, 0xa0000, 0xc0000); // legacy VGA

src/vendorcode/amd/opensil/genoa_poc/opensil.h

@@ -8,7 +8,7 @@
 
 void SIL_STATUS_report(const char *function, const int status);
 // Add the memory map to dev, starting at index idx, returns last use idx
-int add_opensil_memmap(struct device *dev, int idx);
+unsigned long add_opensil_memmap(struct device *dev, unsigned long idx);
 // Fill in FADT from openSIL
 void opensil_fill_fadt_io_ports(acpi_fadt_t *fadt);