kernel_loader: fix ELF Phdr p_type comparison
kernel_loader: fix ELF Phdr p_type comparison

The program header p_type field is an enumerated value, not a bitfield.

BUG=None
TEST=Boot a kernel

Change-Id: I5327cc8de9d8401a74c86fd4f3deab9f390c0924
Signed-off-by: Daniel Verkamp <72bc170b46ec491f7bdd4359a1c0bfed274de40c@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1412835
Tested-by: kokoro <2ac7b1f3fa578934c95181d4272be0d3bca00121@google.com>
Reviewed-by: Dylan Reid <c791bfe44996c1eed9c7149a0c5f12a86d58eb85@chromium.org>

google/crosvm,google/crosvm,google/crosvm,google/crosvm