[media] dib7000p: Fix 4-byte wrong alignments for some case statements

ERROR: switch and case should be at the same indent
 	switch (ch->u.ofdm.transmission_mode) {
[...]
+    case TRANSMISSION_MODE_4K:

WARNING: please, no spaces at the start of a line
+    case TRANSMISSION_MODE_4K:$

ERROR: switch and case should be at the same indent
 	switch (ch->u.ofdm.transmission_mode) {
[...]
+    case TRANSMISSION_MODE_4K:

WARNING: please, no spaces at the start of a line
+    case TRANSMISSION_MODE_4K:$

ERROR: switch and case should be at the same indent
 	switch (ch->u.ofdm.transmission_mode) {
[...]
+    case TRANSMISSION_MODE_4K:

WARNING: please, no spaces at the start of a line
+    case TRANSMISSION_MODE_4K:$

Cc: Patrick Boettcher <pboettcher@kernellabs.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>