MAINTAINERS: Update role for IDXD driver

Move Dave Jiang to reviewer role since he has not been working on the
driver.

Signed-off-by: Dave Jiang <[email protected]>
Signed-off-by: Fenghua Yu <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Vinod Koul <[email protected]>

Author: davejiang

MAINTAINERS

@@ -10941,7 +10941,7 @@ F:	drivers/idle/intel_idle.c
 
 INTEL IDXD DRIVER
 M:	Fenghua Yu <[email protected]>
-M:	Dave Jiang <[email protected]>
+R:	Dave Jiang <[email protected]>
 L:	[email protected]
 S:	Supported
 F:	drivers/dma/idxd/*