ti_config_fragments: rpmsg: Enable OMAP remoteproc support
Add support to build the OMAP remoteproc driver and the dependent
OMAP IOMMU driver. The other dependent OMAP Mailbox driver is
automatically selected by the OMAP remoteproc driver and is also
already enabled in the current config fragment. This driver is
required for remote processor messaging with the IPU and DSP
remoteprocs on various OMAP4+ SoCs.
OMAP Mailbox and OMAP IOMMU are chosen to be built-in, while the
OMAP remoteproc driver is chosen to be built as a module. The IOMMU
debugfs configuration option is also also enabled by default.
Signed-off-by: Suman Anna <s-anna@ti.com>