soc: qcom: mdt_loader: Fix error return values in mdt_header_valid()

This function is supposed to return true for valid headers and false for
invalid. In a couple places it returns -EINVAL instead which means the
invalid headers are counted as true. Change it to return false.

Fixes: 9f9967fed9d0 ("soc: qcom: mdt_loader: Ensure we don't read past the ELF header")
Signed-off-by: Dan Carpenter <[e-mail]>
Reviewed-by: Konrad Dybcio <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

drivers/soc/qcom/mdt_loader.c

···
 		return false;
 
 	if (ehdr->e_phentsize != sizeof(struct elf32_phdr))
-		return -EINVAL;
+		return false;
 
 	phend = size_add(size_mul(sizeof(struct elf32_phdr), ehdr->e_phnum), ehdr->e_phoff);
 	if (phend > fw->size)
 		return false;
 
 	if (ehdr->e_shentsize != sizeof(struct elf32_shdr))
-		return -EINVAL;
+		return false;
 
 	shend = size_add(size_mul(sizeof(struct elf32_shdr), ehdr->e_shnum), ehdr->e_shoff);
 	if (shend > fw->size)