remoteproc: k3-r5: Re-order internal memory initialization functions

remoteproc: k3-r5: Re-order internal memory initialization functions

The internal memory struct pointer, 'mem', will be refactored from
k3_r5_core struct into k3_r5_rproc struct in a future commit.

Therefore, move the internal memory initialization function,
k3_r5_core_of_get_internal_memories() above k3_r5_cluster_rproc_init()
so that the former can be invoked by the later.

While at it, also re-order the k3_r5_core_of_get_sram_memories() to keep
all the internal memory initialization functions at one place.

Signed-off-by: Beleswar Padhi <b-padhi@ti.com>
Tested-by: Judith Mendez <jm@ti.com>
Reviewed-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20250513054510.3439842-6-b-padhi@ti.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>