This adds a few fixes for compiling against Linux 5.10:
1. segment_eq() has been removed with upstream commit
428e2976a5bf7e7f5554286d7a5a33b8147b106a ("uaccess: remove
segment_eq") and can use uaccess_kernel() instead
2. ioremap_nocache() is removed and is now an alias for ioremap() with
upstream commit 4bdc0d676a643140bdf17dbf7eafedee3d496a3c ("remove
ioremap_nocache and devm_ioremap_nocache")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
