The following error is observed on Microblaze [1] build:
```
error: symver is only supported on ELF platforms
```
due to using __attribute__((symver)) on non-ELF platform.
So, revert to using .symver in such case.
Fixes:
http://autobuild.buildroot.net/results/4470efb5a078c0e368f6bd4f5ec455eea5eeebb5/
Upstream status: commit f630ed1f807e26de04b3a5dfd7f1b39d1c5cb642
https://github.com/smuellerDD/libkcapi/pull/147
Signed-off-by: Tan En De <ende.tan@starfivetech.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 216e201cd0)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>