soc: tegra: Move powergate-bpmp driver to the genpd dir

To simplify with maintenance let's move the powergate-bpmp driver to the
new genpd directory. Going forward, patches are intended to be managed
through a separate git tree, according to MAINTAINERS.

Note that, we leave the pmc driver in the soc directory for now, as it
looks like it may need some re-structuring before it's ready to be moved.

Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Mikko Perttunen <mperttunen@nvidia.com>
Cc: <linux-tegra@vger.kernel.org>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/genpd/Makefile

@@ -10,3 +10,4 @@ obj-y					+= rockchip/
 obj-y					+= samsung/
 obj-y					+= starfive/
 obj-y					+= sunxi/
+obj-y					+= tegra/

drivers/genpd/tegra/Makefile

+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP)	+= powergate-bpmp.o

drivers/soc/tegra/Makefile

@@ -5,7 +5,6 @@ obj-y += cbb/
 obj-y += common.o
 obj-$(CONFIG_SOC_TEGRA_FLOWCTRL) += flowctrl.o
 obj-$(CONFIG_SOC_TEGRA_PMC) += pmc.o
-obj-$(CONFIG_SOC_TEGRA_POWERGATE_BPMP) += powergate-bpmp.o
 obj-$(CONFIG_SOC_TEGRA20_VOLTAGE_COUPLER) += regulators-tegra20.o
 obj-$(CONFIG_SOC_TEGRA30_VOLTAGE_COUPLER) += regulators-tegra30.o
 obj-$(CONFIG_ARCH_TEGRA_186_SOC) += ari-tegra186.o