Cpu load dropped when using interrupts for NAND erase
Previous:
time flash_eraseall -j /dev/mtd3
real    0m6.960s
user    0m0.120s
sys     0m1.690s


With Interrupts:
time flash_eraseall -j /dev/mtd3
real    0m6.760s
user    0m0.080s
sys     0m0.270s


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