arc:irqchip: prepare for drivers/irqchip/irqchip.h removal

The IRQCHIP_DECLARE macro migrated to 'include/linux/irqchip.h'.

See commit 91e20b50


("irqchip: Move IRQCHIP_DECLARE macro to include/linux/irqchip.h").

This patch removes the inclusions of private header 'drivers/irqchip/irqchip.h'
and if necessary replaces them with inclusions of 'include/linux/irqchip.h'.

Signed-off-by: Joel Porquet <joel@porquet.org>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>