dt-bindings: drop Sagar Kadam from SiFive binding maintainership

Sagar's email listed in maintainers is bouncing as his division was sold
off by the company. I attempted to contact him some days ago on what the
bounce email told me was his new contact information, but am yet to
receive a response.

Paul and Palmer are listed on each of the bindings, both of whom were
alive & well as of Wednesday so the bindings remain maintained.

CC: Sagar Kadam <sagar.kadam@openfive.com>
CC: Sagar Kadam <sagar.kadam@sifive.com>
Link: https://lore.kernel.org/all/785425ca-4000-a7e4-16d6-4d68c91b158d@kernel.org/Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Link: https://lore.kernel.org/r/20230217180035.39658-1-conor@kernel.orgSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/clock/sifive/fu540-prci.yaml

@@ -8,7 +8,6 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: SiFive FU540 Power Reset Clock Interrupt Controller (PRCI)
 
 maintainers:
-  - Sagar Kadam <sagar.kadam@sifive.com>
   - Paul Walmsley  <paul.walmsley@sifive.com>
 
 description:

Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml

@@ -45,7 +45,6 @@ description:
   from S-mode. So add thead,c900-plic to distinguish them.
 
 maintainers:
-  - Sagar Kadam <sagar.kadam@sifive.com>
   - Paul Walmsley  <paul.walmsley@sifive.com>
   - Palmer Dabbelt <palmer@dabbelt.com>
 

Documentation/devicetree/bindings/pwm/pwm-sifive.yaml

@@ -8,7 +8,6 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: SiFive PWM controller
 
 maintainers:
-  - Sagar Kadam <sagar.kadam@sifive.com>
   - Paul Walmsley <paul.walmsley@sifive.com>
 
 description:

Documentation/devicetree/bindings/riscv/sifive,ccache0.yaml

@@ -8,8 +8,7 @@ $schema: http://devicetree.org/meta-schemas/core.yaml#
 title: SiFive Composable Cache Controller
 
 maintainers:
-  - Sagar Kadam <sagar.kadam@sifive.com>
-  - Paul Walmsley  <paul.walmsley@sifive.com>
+  - Paul Walmsley <paul.walmsley@sifive.com>
 
 description:
   The SiFive Composable Cache Controller is used to provide access to fast copies