irq: add "dump_irqs" command support

Change-Id: Ia20bc3b0f4dc600f311ba3de0e75714b5d4c002c
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

irq: add trigger count and enable/disable stat

Change-Id: I3f29c4e3e420be0fe545a2f55f238345a17eaa6a
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

irq: add irq_handler_enable_suspend_only() interface

Change-Id: I3cda4c3a4ce5928be32eaa8b65ccd4e16946c116
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

irq: add virq irq-chip support

This patch support the device to add its interrupt controller as "irq chip"
into generic interrupt framework, the other driver can request its child
interrupt like a r

irq: add virq irq-chip support

This patch support the device to add its interrupt controller as "irq chip"
into generic interrupt framework, the other driver can request its child
interrupt like a real hardware irq.

Example for PMIC:
GIC-\
|- ...
|- GPIO-\
|- ...
|- PMIC-\
|_ virq_0
|_ virq_1
|_ virq_2
|...
|_ virq_n

Change-Id: I17716f3db494a85fc22b23ff18042771a6116da8
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>

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irq: clean up code

Change-Id: I51c2713b7c42fa798fee6971a2c91d867042ef70
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>