disk: part_efi: fix regression due to incorrect buffer usage

Commit deb5ca8027 "disk: part_efi: fix
**pgpt_pte == NULL" modified the code to pass "&gpt_head" to
is_gpt_valid() rather than the previous "gpt_head". However, gpt_head
is a pointer to the buffer, not the actual buffer, since it was allocated
using ALLOC_CACHE_ALIGN_BUFFER. This caused is_gpt_valid() to read the
disk block onto the stack rather than into the buffer, causing the
code to fail.

This change reverts that portion of the commit mentioned above.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Doug Anderson <dianders@chromium.org>
Tested-by: Simon Glass <sjg@chromium.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Anton Staaf <robotboy@chromium.org>

disk/part_efi.c

@@ -130,7 +130,7 @@ void print_part_efi(block_dev_desc_t * dev_desc)
 	}
 	/* This function validates AND fills in the GPT header and PTE */
 	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
-			 &(gpt_head), &gpt_pte) != 1) {
+			 gpt_head, &gpt_pte) != 1) {
 		printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
 		return;
 	}
@@ -169,7 +169,7 @@ int get_partition_info_efi(block_dev_desc_t * dev_desc, int part,
 
 	/* This function validates AND fills in the GPT header and PTE */
 	if (is_gpt_valid(dev_desc, GPT_PRIMARY_PARTITION_TABLE_LBA,
-			&(gpt_head), &gpt_pte) != 1) {
+			gpt_head, &gpt_pte) != 1) {
 		printf("%s: *** ERROR: Invalid GPT ***\n", __func__);
 		return -1;
 	}