ARM: dts: AM4372: Add L2, EDMA, mailbox, MMC and SHAM nodes

Populate nodes for l2-cache-controller, EDMA, mailbox,
mmc, sham.

Update as well DT properties for epwmss, aes, des.

Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Balaji T K <balajitk@ti.com>
Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Signed-off-by: Benoit Cousson <bcousson@baylibre.com>