efi/capsule-loader: fix incorrect sizeof in phys array reallocation

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SUSE CVE-2021-47547

In the Linux kernel, the following vulnerability has been resolved: net: tulip: de4x5: fix the problem that the array 'lp-phy8' may be out of bound In line 5001, if all id in the array 'lp-phy8' is not 0, when the 'for' end, the 'k' is 8. At this time, the array 'lp-phy8' may be out of bound...