dt-bindings: remoteproc: qcom: Drop types for firmware-name

dt-bindings: remoteproc: qcom: Drop types for firmware-name

The type of firmware-name is already defined by core schemas.  Drop it
from individual bindings that have either a redundant definition or
an override as string type.  For the later cases, constrain the number
of expected firmware names to 1.

Signed-off-by: Shawn Guo <shengchao.guo@oss.qualcomm.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260309123357.1911586-1-shengchao.guo@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>