media: iris: rename module file

Build-testing on x86 showed two modules with conflicting "iris.ko"
names after the addition of the qualcomm driver:

   error: the following would cause module name conflict:
     arch/x86/platform/iris/iris.ko
     drivers/media/platform/qcom/iris/iris.ko

Since this a new module, nothing should rely on the name yet, so
rename this one to a more specific "qcom-iris.ko".

Fixes: 38506cb7 ("media: iris: add platform driver for iris video device")
Cc: Shérab <Sebastien.Hinderer@ens-lyon.org> # for x86 iris
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>