i2c: xiic: Remove the disabling of interrupts

Currently the interrupts are disabled at the start of the
isr and enabled at the end of the isr. Remove the same.

In case the slave device NACKs the transaction while in the isr
the transfer will continue and the NACK interrupt will arrive
only after the isr is serviced.
Signed-off-by: NShubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-xiic.c

@@ -604,14 +604,11 @@ static irqreturn_t xiic_isr(int irq, void *dev_id)
 	struct xiic_i2c *i2c = dev_id;
 
 	spin_lock(&i2c->lock);
-	/* disable interrupts globally */
-	xiic_setreg32(i2c, XIIC_DGIER_OFFSET, 0);
 
 	dev_dbg(i2c->adap.dev.parent, "%s entry\n", __func__);
 
 	xiic_process(i2c);
 
-	xiic_setreg32(i2c, XIIC_DGIER_OFFSET, XIIC_GINTR_ENABLE_MASK);
 	spin_unlock(&i2c->lock);
 
 	return IRQ_HANDLED;